Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4b26bfa63357a0…

MALICIOUS

PDF

41.3 KB Created: 2020-07-29 15:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba5a428594378083526efac678ba666c SHA-1: 52238f5de119fe974276f714fcfbe90e313e07f6 SHA-256: 8c4b26bfa63357a057f191d22dd808bc15ecb9c90da5a28596ca6ca79b97dcc9
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to direct users to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination. The ML classifier also strongly indicates maliciousness.

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.com/pify?keyword=ccna+wireless+official+exam+certification+guide+pdf In PDF document text
    • http://files.casey-lab.com/uploads/1/3/1/0/131069875/2999992.pdfIn PDF document text
    • http://files.trinitychapelwv.org/uploads/1/3/0/7/130775922/7691296.pdfIn PDF document text
    • http://files.shopgroveonline.com/uploads/1/3/1/4/131452750/pudexaziga.pdfIn PDF document text
    • http://files.texasbrowndog.com/uploads/1/3/2/6/132695397/vibudinuzu-pesilenujudufi.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/1/0429/1421/8151/files/35585641251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/vijozigavolaluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/27284911554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/fipugiwajubuwatiwatumulip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/reziwekami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/sivusasike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/20482043818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/97237533428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/tarifenezefamapalowirazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/fologukutojuw.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 4

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_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 5540 bytes
SHA-256: 18640959b3902fa22e90e8c2cb3352001db50de7ceec0baf1a3dbd9ecf71ec3d
font_01_sfnt_off0000743e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743E 10420 bytes
SHA-256: a68f10e2d80c9aedaa792da64a2047499b1be8255d5d04a3f9ba35f12974f25b

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