Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9a14df845d33c0…

MALICIOUS

PDF

39.1 KB Created: 2020-08-19 09:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ab50b046a3e37becb998668700890c2 SHA-1: 2c5484e2accc57ac5cf0c20ea4ca2b03cbfa05fc SHA-256: 3b9a14df845d33c0682b9015f010e4a1f88baf7d4eec331d1351d83df7039a27
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'sabbatical leave report sample' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links to Shopify-hosted PDFs indicates a link farm used for SEO poisoning or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=sabbatical+leave+report+sample In PDF document text
    • http://makewo.pyester.com/uploads/1/3/1/4/131438464/3867011.pdfIn PDF document text
    • http://mudaso.theoutcomemusic.com/uploads/1/3/1/3/131398020/xuzemefenufaf_suposavu.pdfIn PDF document text
    • http://wowedoma.avayogabodywear.com/uploads/1/3/2/6/132683031/356013.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/1/0432/5962/5627/files/suxiwiladil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1446/3386/files/likoxodezowezumamifefemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/98471981307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/72232117786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/99568895252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/engineering_c_programming_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/58957649615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/gapaxirijimesivozar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6588/9188/files/accept_attribute_in_input_file_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/20670801288.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
🗂 Part of campaign: pyester.com 3 samples

Related samples 2

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_off00005bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCE 5380 bytes
SHA-256: dc0623ba4db0292d3f2309b10a33f355d765a9f227b3b63b71c03b3390ab1db9
font_01_sfnt_off00006df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 9872 bytes
SHA-256: 8dd298dd5553511d08ec6311718438af9ecc90342c283b680bd0d8050b450787

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