Malicious PDF — malware analysis report

Static analysis result for SHA-256 b281a833cd126a50…

MALICIOUS

PDF

40.8 KB Created: 2020-08-21 13:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff19d8c583e03a1f97193075d55b9fb2 SHA-1: 850f099e7d8212518567c3e518ab0725786fa0a0 SHA-256: b281a833cd126a5066d9d9efd5cf854b425cdd05ec03d65ee2167eb30d37be70
194 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=performance+review+comments+by+employee+examples', suggesting a lure to trick users into clicking the link. The redirector likely serves as a gateway to further malicious content or exploits.

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.cc/pify?keyword=performance+review+comments+by+employee+examples In PDF document text
    • http://vizaw.amarisspa.com/uploads/1/3/0/8/130814328/8771896.pdfIn PDF document text
    • http://galeza.powerofmath.net/uploads/1/3/1/3/131379478/2050617.pdfIn PDF document text
    • http://files.lissawozniakphotography.com/uploads/1/3/1/3/131384383/xutik.pdfIn PDF document text
    • http://files.new-england-marketing.com/uploads/1/3/1/4/131438071/195383f811296f.pdfIn PDF document text
    • http://files.breezyshoresmininubians.com/uploads/1/3/1/8/131856409/2235705.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/1/0429/5252/3929/files/gololemaxukakowalejugikul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/42294375894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/50429581914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/newutavinapabatesud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/6561313820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/jevuteparazoserajovopes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/vorukifexemapexakufan.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_off00005f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 5624 bytes
SHA-256: 1539e519cd2b7fe1197d7185aceeae1b7b2598fc77c8464145efdf81f51a7e99
font_01_sfnt_off00007273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 10588 bytes
SHA-256: 250c19362f615de934bf409b9318250fe5dc71a801ac99faa4486ebee4041725

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