Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a8b9ce20c9ce46…

MALICIOUS

PDF

40.8 KB Created: 2020-08-21 07:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf870a0345d46ea80f6645dcd3151de5 SHA-1: 1c99589e8bbeb9fd796d9cc70f9a724249584792 SHA-256: 49a8b9ce20c9ce46109a89bb087f6765a96e039c2ba1de89f1320d3b694a1de4
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to a redirector service, which in turn points to a link farm of other PDFs. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains the same lure text and URLs, indicating a deliberate attempt to deceive users into clicking malicious links. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+printable+multiplication+worksheets+grade+2 In PDF document text
    • http://files.nwtherapy.solutions/uploads/1/3/0/7/130740298/7895457.pdfIn PDF document text
    • http://files.paulbergerpictures.com/uploads/1/3/0/7/130776757/3296e26149560a3.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/1/0428/5802/1027/files/20885949004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/california_dmv_bill_of_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/is_project_64_safe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/sufelorosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/bhagavad_gita_in_kannada_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/prius_manual_transmission.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/capital_investment_appraisal_excel_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/15627756996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/lupidabunuxalewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/snapseed_for_windows.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 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 5872 bytes
SHA-256: 8e4960121bba41421f9a80fcf00d2d84ae012641432441500e738531694b86ef
font_01_sfnt_off00006f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 11604 bytes
SHA-256: cb75ad5d02e109d0d10e79b2cf3a9db7726704e708b06276adc8f53a71077689

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