Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d8587ea5a9f14a…

MALICIOUS

PDF

74.4 KB Created: 2020-08-10 00:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 126b0a7361438769726620801cd3b73e SHA-1: 6d7de7f1c05392f5ee9af0348363f036bbc1fc93 SHA-256: a5d8587ea5a9f14a69d988b408608fa19869b6140fa9a20cf0484f54b99b104c
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, 'https://ttraff.ru/pify?keyword=analog+video+vs+digital+video+pdf', points to known malicious redirector infrastructure. The document appears to be a link farm designed to distribute traffic to a large number of other PDF files hosted on various domains, likely as part of a SEO poisoning or phishing campaign.

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=analog+video+vs+digital+video+pdf In PDF document text
    • http://files.divaandmeproductionsinc.org/uploads/1/3/1/6/131607712/luzobapuxofa.pdfIn PDF document text
    • http://files.thepetshelter.org/uploads/1/3/2/3/132303077/1015985.pdfIn PDF document text
    • http://files.houstonmiddlepto.com/uploads/1/3/1/0/131071252/2270806.pdfIn PDF document text
    • http://files.kingyangtransport.com/uploads/1/3/1/6/131637226/cab5bf24c4.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/1/0429/5832/3865/files/37835381266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/bawikatuxog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/70787980348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/nursing_interventions_for_depression.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/mk_11_fatalities_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/16665094817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/74409297163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/dekezawovusininur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7688/2342/files/mawijako.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_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 5164 bytes
SHA-256: f778a705a52c13c477586a09a4590294580eae3559fb611259e63fcee6c2cd3d
font_01_sfnt_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 11132 bytes
SHA-256: 96fe2f67608310259c7e95b5b45a05b397042a6514635a89d13027e9757c2787

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