Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb8a128f8a6d1fe…

MALICIOUS

PDF

35.5 KB Created: 2020-08-25 04:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e025ac66f87c89f03db2869a2c0aa5e SHA-1: e76840131037ff2929ba7ab0856c93e017500e1e SHA-256: cbb8a128f8a6d1fe29c8afdf45f447fb7d1c25d257b4bfe9ba97965b26fe5da4
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, specifically pointing to 'https://ttraff.ru/pify?keyword=3d+anatomy+apk'. This URL is presented within the document body, suggesting a lure to download an "apk" file. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/pify?keyword=3d+anatomy+apk In PDF document text
    • http://pagejabo.longhorncaverns.org/uploads/1/3/1/4/131483167/jogit_denipese_lulubonikawejex.pdfIn PDF document text
    • http://files.mmarieboutique.com/uploads/1/3/1/4/131407901/6892966.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/interior_design_flyer_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/movesosoxilorere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/libros_sobre_el_aprendizaje_significativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/21313330629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9906/3199/files/farobomesemar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/86561276816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/bevezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/incidencia_delictiva_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/training_attendance_sheet_xls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/renerabirawupaxunuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4162/6011/files/dugolinigexutopamosuk.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 1

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_off00004336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4336 4656 bytes
SHA-256: 7ba3a21e6647ad8510c12ea1e4ce86f392d406c0f145d9eb07d3dd7fda986100
font_01_sfnt_off000052ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EA 9504 bytes
SHA-256: 0d4ca94e7a57605ded3d7b5ccd9e11eaf570742e450bd3315f275b79bbc202ea
font_02_sfnt_off00007372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7372 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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