Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51a5af64bb657ba…

MALICIOUS

PDF

46.0 KB Created: 2020-08-18 14:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cedacd443751835a68f617e828db5c96 SHA-1: 406edf6143f48e5f9e25f2fb04909b0dd66e3636 SHA-256: a51a5af64bb657ba5a81c9137fab1cc8db3b8007a36b4446589d84870acb9908
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body also contains the same redirector URL, suggesting an attempt to lure the user to a malicious site. The heuristic 'SE_MFA_LURE' indicates the document may be designed to harvest credentials or abuse multi-factor authentication, further supporting a phishing attack pattern. No scripts were extracted from this sample.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=botulism+merck+vet+manual In PDF document text
    • http://files.getinvolvedbeaverhead.org/uploads/1/3/2/6/132695636/xukalolef.pdfIn PDF document text
    • http://files.thunderboyasia.com/uploads/1/3/0/7/130775025/b8f03.pdfIn PDF document text
    • http://files.greeceneedslove.com/uploads/1/3/1/8/131856162/wenagibetowatijok.pdfIn PDF document text
    • http://pevob.savvysandyruiter.com/uploads/1/3/1/6/131606490/kuduwinejunaxov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/jomozolapifufad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/16987509189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/introduo_a_agrometeorologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/benovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/capex_opex_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/jibafogelumarotelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/volodenejomofagefevar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/murilanenamebutitisonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/10875626898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/cbic_exam_secrets_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5794/1402/files/nfl_schedule_week_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/bodifolapuwurezoxam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/carrier_30xa_chiller_manual.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D2 5000 bytes
SHA-256: 0617252dfd9422fda2fdcffd985d6c070e1b5315ac9718f3a90fd753c32a4ede
font_01_sfnt_off000078bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BC 10532 bytes
SHA-256: 0e6412fed39516b48f77e0b37bd7f781c9e8366ef4701ed72959ec9bec78ed4d
font_02_sfnt_off00009c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c