Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a66efcfeefd17f1…

MALICIOUS

PDF

44.9 KB Created: 2020-08-05 13:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ee34bcf01c84a7fe160047e8632d06a SHA-1: 334a26bb7145b9d37b88f9233758491939f33017 SHA-256: 8a66efcfeefd17f1b9fb3814b23928a7796a5fa229f3e9ada9f34e650ed93402
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a title related to 'side effects of antiretroviral drugs pdf', suggesting a lure. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to distribute malicious content.

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=side+effects+of+antiretroviral+drugs+pdf In PDF document text
    • http://files.headsuptraining.co.nz/uploads/1/3/1/8/131856276/werefapi_nudizari_mezegufebojad.pdfIn PDF document text
    • http://files.reallifesigns.com/uploads/1/3/0/9/130969993/kutesudilezomiwufa.pdfIn PDF document text
    • http://files.digitalmindset.ltd/uploads/1/3/1/4/131407459/biwipobuf_vowefapadi_nenazukufegusuf_zikotujufenokav.pdfIn PDF document text
    • http://files.retroquesting.com/uploads/1/3/1/0/131070651/6887a9dd.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/1/0431/7993/3862/files/big_anthony_and_the_magic_ring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/vapuvixokuwemidejajos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/jokogereteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/17156242870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/bivamilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/fosidasafakunugen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/74277123270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/20987352245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/vivuvokoboxapalenujexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/66565841990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/a_noite_do_meu_bem_ruy_castro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/charcoal_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/nibutagevukewavujo.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 4

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_off00007271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 5488 bytes
SHA-256: 2d4f894a68ee516bca3ba526725043589475d965a321c53ab3bbf2864b83b666
font_01_sfnt_off00008538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8538 9760 bytes
SHA-256: f43f2874d11a73ba85d5f2e2bac05ff43feaa2d72d1f2d1f04168268ebbb9900

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