Malicious PDF — malware analysis report

Static analysis result for SHA-256 acafb10e7b961625…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 05:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76505b97763b32c73ab9d19215ae8d64 SHA-1: 710319b6da4f82398b214e3b2e8a6439b14077df SHA-256: acafb10e7b961625fe8850e539fde6a55cf12f156cd78a0583c24e37494642ec
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains an embedded script payload and a malicious redirector link, indicating an attempt to deliver further malicious content. The document body, though heavily obfuscated, contains text related to PDF editing and URLs that are part of a link farm, suggesting a lure to entice users to click on the malicious redirector. The embedded script is likely responsible for initiating the redirection or downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=edit+pdf+adobe+acrobat+x+pro In PDF document text
    • http://porubixot.foothillsflyingclub.com/uploads/1/3/1/0/131070374/wejiwufalawe.pdfIn PDF document text
    • http://dapaja.blendily.com/uploads/1/3/2/3/132303189/balani_darekubesep_vogolami_mefajodajufad.pdfIn PDF document text
    • http://xawanumav.teressamediumreadings.com/uploads/1/3/1/3/131383284/gudaburipi.pdfIn PDF document text
    • http://files.rmmfoundation.org/uploads/1/3/1/6/131606392/9231578.pdfIn PDF document text
    • http://pajep.vancen.org/uploads/1/3/0/8/130814674/1993498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/monosacaridos_definicion_y_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5705/7685/files/68811463461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6709/5705/files/iowa_odometer_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/gaxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/fixasaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/10_000_reasons_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/foxigifixabaxexet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/43350687418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/jigov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/wefutifiwokepozomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/admin_template_free_for_laravel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/dubuzaguxizepir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/automate_the_boring_stuff_with_powershell.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00003708.bin pdf-embedded-script PDF decompressed stream script payload at offset 0x3708 100 bytes
SHA-256: dd4dd521f9398b3f388b1f1d2f0505d51b6c229544fc993c56919a20bbb38945
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
https://cdn.shopify.com/s/files/1/0435/8494/6333/files/automate_the_boring_stuff_with_powershell.pdf
font_00_sfnt_off00006107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6107 5104 bytes
SHA-256: 74736c3e88c8434145c1edd171ae5374539cb68b6f83308991eea62646cd14ab
font_01_sfnt_off00007276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 9776 bytes
SHA-256: fd8dedc915636ab05825bad07dee82dbe9b65cf81403d8be4d1d911ca474d2ef

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