Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a423cd81d2687c8…

MALICIOUS

PDF

48.5 KB Created: 2020-08-01 17:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 283fc568a322e546a77bf39e7fadf33f SHA-1: 0c01a1522144383af06730bf9036acb611225cc3 SHA-256: 3a423cd81d2687c8b330303ca9bc373c32cb849af5b0acf37b1755bbcc6711da
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The presence of a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=osrs+rotten+tomato', indicates a malicious intent to redirect users to harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, so the primary attack vector appears to be the manipulation of document links.

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=osrs+rotten+tomato In PDF document text
    • http://files.meetprojectsound.com/uploads/1/3/1/4/131437680/dupapufiremop_katakerebofad_fasawo.pdfIn PDF document text
    • http://files.andrewflojo.com/uploads/1/3/2/3/132302924/7cb2b4b2e.pdfIn PDF document text
    • http://files.hustlera.co/uploads/1/3/2/6/132681885/dunorenu-kosoririxajukox.pdfIn PDF document text
    • http://files.hooversfarmsupply.com/uploads/1/3/0/9/130969334/2026091.pdfIn PDF document text
    • http://files.silvastudioart.com/uploads/1/3/1/3/131383727/c2b014a40.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/1/0429/2804/6233/files/damerup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8225/1421/files/13425206050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/86360195311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/kileraxuvozofitoferazadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/voxadir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/35918242212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/7777013985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/backroom_casting_couch_compilation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/duwakesitadakiguxox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/openvpn_duplicate-_cn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/lizusiwojidogok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/77725893181.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_off00008261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8261 4828 bytes
SHA-256: b85e3a08530073a2c8e11d1cd562b4779df1d67df78033640ad12a0d933df36e
font_01_sfnt_off000092ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AB 10148 bytes
SHA-256: b6d31fe9419d4323eb3ac60a6de30330026a479264e583014cc9da0d66d2c121

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