Malicious PDF — malware analysis report

Static analysis result for SHA-256 0758cbaf808e8fda…

MALICIOUS

PDF

39.6 KB Created: 2020-08-15 14:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c8a341dbb91dc7762d900d41e4e0637 SHA-1: 0e595353b33412525cdee09c37289d9469acb604 SHA-256: 0758cbaf808e8fda59f3c241e84bae9c8d6b8dac292230904f3539bdd089763e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.ru' which is associated with malicious activity. The document body, though heavily obfuscated, contains references to the 'cartesian diver experiment' and a URL pointing to a Shopify domain, suggesting a lure for SEO manipulation or phishing. The presence of multiple external PDF links further supports the SEO link farm heuristic.

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/wb?keyword=cartesian%20diver%20experiment%20pdf In PDF document text
    • http://files.newtesting.org/uploads/1/3/1/3/131383934/edc839013e7036.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/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1456/9631/files/list_of_adjectives_to_describe_personality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/beropevidamaruzusorizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/synonyms_worksheet_for_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/bratstvo_crnog_bodea_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6585/8455/files/15393713905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9208/6685/files/eighteenth_brumaire_of_louis_bonaparte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/6189050145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/70696340192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/abc_song_for_child_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/47821097736.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 2

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_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 5188 bytes
SHA-256: 623286a120e6cb806b4ebdf6a40cf2e333a5be7c0b98e08f5665428d593b5b41
font_01_sfnt_off00006faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 10076 bytes
SHA-256: 0c02ac0d896d4402f53475d7031ba5f094368d3b9314d0e1308a265ce3199996

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