Malicious PDF — malware analysis report

Static analysis result for SHA-256 236579a749480cec…

MALICIOUS

PDF

45.2 KB Created: 2020-08-22 14:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75a9d6c1ef8e52a939b676f9bf14633d SHA-1: b85e9fa9dbe9cb9e771c32e88c8e2889bb7821c2 SHA-256: 236579a749480cecf705f52c3259898eccf4170ce9094b8369056d09fdb2eccf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a 'Fjallraven uk size guide'. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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=fjallraven+uk+size+guide In PDF document text
    • http://zixapo.industryumc.org/uploads/1/3/1/4/131454207/5709541.pdfIn PDF document text
    • http://files.musicianpierre.us/uploads/1/3/0/7/130775084/1037371.pdfIn PDF document text
    • http://xegokike.kyokanconnect.com/uploads/1/3/1/4/131438539/gudufe-xojali-rufuxogunaz-juvuvuwewipi.pdfIn PDF document text
    • http://files.randirouge.com/uploads/1/3/1/4/131408537/7877400.pdfIn PDF document text
    • http://files.centralbedsswimsquad.com/uploads/1/3/2/6/132681617/3166659.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/1/0438/6711/1584/files/jikalujenegelaperi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/74389741540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/xuleba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/calligraphy_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/27472910591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/5484160858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/4108435163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/miligidesojekonig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/3344176920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/5061660664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/lipurekilobovobisepet.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_off00006636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 5200 bytes
SHA-256: 83f4af42185218bf5978590fd42f68665a57eb07607a2ec93f9c594b67e5f6e9
font_01_sfnt_off00007805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 15512 bytes
SHA-256: 969059e43417238bdf06c656e932fd595db4cbebd008b11c6ebecf19cbbe6772

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