Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a487cc2739317b3…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 02:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e66ab4b2b38a3f37d21516e2cc99289d SHA-1: 1d67a41923b58c37f6451990a6905bbca0b525da SHA-256: 6a487cc2739317b357b5ad8d677979b173bdcace1473842d68d07209b1c11b89
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a legal form, likely a lure to encourage clicks. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to malicious infrastructure via embedded links.

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.com/pify?keyword=habeas+corpus+writ+form In PDF document text
    • http://bipoda.pokornychiropracticclinicsd.com/uploads/1/3/1/4/131453134/8190000.pdfIn PDF document text
    • http://files.eaststokesoutreachministry.org/uploads/1/3/1/3/131398010/28da344121.pdfIn PDF document text
    • http://files.iscodesigns.com/uploads/1/3/1/3/131383681/8345625.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/1/0437/5481/5640/files/98178022977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/2037263583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/calculus_early_transcendentals_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/76595698321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/schaum_series_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/makarebanomorajejunufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/73127762009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/56961538558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/2001_pt_cruiser_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/steamvr_oculus_quest.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C1 5320 bytes
SHA-256: 48eff995fa23a99bef8fb4f69ea9a8bf78bfb97df27591e7bd178e17ed7ad051
font_01_sfnt_off000078ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 9620 bytes
SHA-256: c4ee7413f7a669ff6d490c6626437d1722b56bc9dce8d6590c40aae1f801c184

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