Malicious PDF — malware analysis report

Static analysis result for SHA-256 8572477f9b71e64a…

MALICIOUS

PDF

37.3 KB Created: 2020-08-06 00:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea12a9837d44489b80436050d018bb65 SHA-1: 0765ad7693ba27b1a9bf5d51f8636543ed9b9e93 SHA-256: 8572477f9b71e64aa27767bde2e822880fd9e2c0cc18c31b678bbc4292144508
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are part of a link farm designed to manipulate search engine results. A critical heuristic identified a link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=chinese+bilingual+visual+dictionary+pdf, which is also flagged as a malicious redirector.

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=chinese+bilingual+visual+dictionary+pdf In PDF document text
    • http://files.usfitnessfreaks.com/uploads/1/3/0/7/130775659/fedcb1.pdfIn PDF document text
    • http://files.paintbytunnels.com/uploads/1/3/0/7/130775554/80f3c81716bf.pdfIn PDF document text
    • http://lurokixu.vjvhomeimprovements.com/uploads/1/3/1/8/131872225/c1fcd7bdb6da.pdfIn PDF document text
    • http://files.edgeproductions.ca/uploads/1/3/1/4/131437147/a1982cdea5fa.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/1/0431/4267/6648/files/the_way_of_the_wolf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/bipidadujadupijug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/28738384532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/6425551519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/58896212719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/77800996570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/59867297402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/62990612146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4843/4844/files/an_anthology_of_short_stories_icse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/fonomegiwedukuk.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_off0000528a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x528A 5624 bytes
SHA-256: d241361b913db56460f7b8fab5de5ded61f4414e43a6ebd51bf49cbd20a8bcfe
font_01_sfnt_off000065af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 10332 bytes
SHA-256: a226ec89109c9556d4aa97edb8220627dc06c26974bf349aeffeb6f7b38ad0d1

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