Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d68fddb99e6d5f8…

MALICIOUS

PDF

36.9 KB Created: 2020-08-12 19:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b561e235aabb265ad41669b1bab0a532 SHA-1: 86c772e53398f030e0b577fea5f488abea9a1e0a SHA-256: 6d68fddb99e6d5f87cceb4c0c4202cd7b49572c60cfbddc3180c484aeb9b3cf4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=linear+algebra+herstein+pdf', which is flagged as malicious. The document body also contains numerous links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic to lure users. The ML classifier 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.cc/pify?keyword=linear+algebra+herstein+pdf In PDF document text
    • http://files.srinagarhotel.net/uploads/1/3/1/4/131483275/nediwoterobaxukizak.pdfIn PDF document text
    • http://files.thedimensionart.com/uploads/1/3/1/3/131379999/77520b640.pdfIn PDF document text
    • http://files.mindstatepsychology.com.au/uploads/1/3/1/1/131164081/todatobakowivazub.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/1/0431/3153/5524/files/8404538196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/37749094534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9078/files/florida_state_football_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/sedudexevewivogel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/xonuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/12328976030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/autocad_to_dwg_converter_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/narelawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/supudesogixisuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/mabodokarunofubibuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/mukazotomoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/bokizinuruximekipat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/advantages_of_public_private_partnership.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D1 3932 bytes
SHA-256: 2af0d2bd4c8ee51c3cc3140e7511c5da4d4bc022c3e54aad36afe820a8b8107d
font_01_sfnt_off00005488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5488 5384 bytes
SHA-256: ec6f6493b163790c20d9e6fecaf37fd98efb82f5087117afea33e1a9932ee89b
font_02_sfnt_off000066c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 9312 bytes
SHA-256: 277c58dbbdf6e6c311c99fa0298b7564e4101014188f5ad713f3bd76d833c67e

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