Malicious PDF — malware analysis report

Static analysis result for SHA-256 872a7103cf86e8de…

MALICIOUS

PDF

40.9 KB Created: 2020-08-01 01:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b09af4f3dc0c7e7f92054479147c8fb SHA-1: 1e168110c5af5978f575d8d37686898606bced03 SHA-256: 872a7103cf86e8de94b380a94a1e94eba18415cecadd4662e5833c26283d5883
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'texture packs' and embeds numerous links, many of which point to a redirector service (ttraff.ru). This redirector is flagged as malicious and is likely used to funnel victims to further malicious content or phishing pages. The ML classifier strongly supports the malicious verdict, and the structure indicates a link farm designed for SEO manipulation to distribute malicious content.

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=1.+6.+4+texture+packs In PDF document text
    • http://files.twin-city.org/uploads/1/3/1/3/131384401/eaafaec716ad47a.pdfIn PDF document text
    • http://files.c3industriesllc.com/uploads/1/3/0/7/130776726/xufadujedus.pdfIn PDF document text
    • http://files.woodcraftbybean.com/uploads/1/3/2/6/132696128/f9446121f.pdfIn PDF document text
    • http://files.usczbusinessforum.com/uploads/1/3/0/8/130874544/fcf36178392.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/1/0435/1927/9259/files/4798091974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/55624707314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/kopagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/20583826940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/64046984649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/jibozogef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/kovajuleki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/87493624523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/95117280251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/gavobojorekimojaxegawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/wunupivegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/vuvafipen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/mimujuxolutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/58620093933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/wumapana.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5913 5260 bytes
SHA-256: f33de7086da53ced6964651cf2774327bd271bf1711bd2cd275d75b64ea0f36b
font_01_sfnt_off00006b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B14 13824 bytes
SHA-256: 315ba5c238c337cc3c62ea6ea92a7087e4782cdca3c94cc44b5c38299eff2a6a

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