Malicious PDF — malware analysis report

Static analysis result for SHA-256 940733d78983cc63…

MALICIOUS

PDF

46.5 KB Created: 2020-08-27 15:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2691ab8f8ff9f01c3fa2fcae9e6baad8 SHA-1: 0382457d71f50bb62e40e40af2b819ceb5ac581d SHA-256: 940733d78983cc639bb7070ea0d0f7694b64af7bbae38dac6a74047b8a29d12a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a direct link to a known malicious redirector, ttraff.ru, which is associated with a callback phishing lure. The document body, though heavily obfuscated, contains the phrase "Home phone number" and the malicious URL, reinforcing the callback phishing pretext. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or distribute content through a link farm, potentially to mask the malicious redirector.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=home+phone+number In PDF document text
    • http://pizanelad.frameworkfitnesstucson.com/uploads/1/3/0/8/130814328/bopemezazit.pdfIn PDF document text
    • http://lotezoki.guideswithin.com/uploads/1/3/2/6/132683014/tulegawamabi.pdfIn PDF document text
    • http://zejixusa.persiantechnicalanalyst.com/uploads/1/3/0/8/130813325/noluti-sifujageviw.pdfIn PDF document text
    • http://xiwodi.senjistudios.net/uploads/1/3/1/4/131482916/kalozinuriweg.pdfIn PDF document text
    • http://files.sai-deltamu.com/uploads/1/3/2/7/132712222/6314576.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/1/0431/7980/2782/files/que_es_la_musica_popular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/empathy_altruism_hypothesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/55050217861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7052/9192/files/job_hopper_resume_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/10480285070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/natawalegubujivobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/winatesoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/ravupefexafez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/jujalamiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/metabolisme_protein_pada_unggas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/xafer.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 4496 bytes
SHA-256: 04d65d7fe4ffc80626c3a248e02d0df2148b507ba645e9e3d19206b49b82e185
font_01_sfnt_off00007c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4D 10192 bytes
SHA-256: 4541784efb6197b38a5299726eec5c386e227e177499d0fbf216ce8b4e4e95c4
font_02_sfnt_off00009f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F26 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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