Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5544ee1e4c04dd…

MALICIOUS

PDF

36.0 KB Created: 2020-08-24 01:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87e1d17a676c40d3906cea21cfca3782 SHA-1: b3c0ef2d25f5298d9f6012e96ee3b73fc630df0f SHA-256: 7a5544ee1e4c04dd0f95d155e0c08479b0adeed77530d605e0e3b7e977d018ca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, ttraff.ru, masquerading as a cost accounting PDF download. This is further supported by heuristics indicating a malicious redirector and a link farm. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution.

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=cost+accounting+past+questions+and+answers+pdf In PDF document text
    • http://mikodugij.trainingspaceokemos.com/uploads/1/3/1/3/131380181/a8ca9.pdfIn PDF document text
    • http://files.coachedscience.com/uploads/1/3/0/8/130874254/464750.pdfIn PDF document text
    • http://files.miortuk-alaskan-husky-kennel.com/uploads/1/3/2/6/132682829/xidowipew.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/1/0429/7788/6367/files/46930052020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/59584038129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/76440639136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/articulacion_atlantooccipital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/diskpart_initialize_disk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/gagabuduzatubalezuzaweda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/12698592533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/que_es_el_catecismo_de_la_iglesia_catolica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/94225292570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/mutupisaxegabavipumajaxum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5338/3586/files/request_for_customs_clearance_information_dhl.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 5

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_off000048c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C6 5412 bytes
SHA-256: a8ca6a880c6968f261c4f9ba7bf732f8fb51b55f59f985368ba855741faea7cb
font_01_sfnt_off00005b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4B 12836 bytes
SHA-256: aa1fa53eff71e35f4fad9076119d8a36570427c7bddc8d0336260983d126d5cf

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