Malicious PDF — malware analysis report

Static analysis result for SHA-256 c771f6a65b62957d…

MALICIOUS

PDF

70.0 KB Created: 2020-08-09 00:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80bf4c50d800d5149a978929a908bf45 SHA-1: fc6227e452c56f3386dffcf8376a02708851d478 SHA-256: c771f6a65b62957d266f78356e3ed12b5a41c0fa1f0a54fdda9a6d4b5aba5467
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a document about variable valve timing. The link leads to 'ttraff.com', which is flagged as malicious. The document body also contains the same URL, reinforcing the lure. The presence of numerous external PDF links suggests a link farm for SEO poisoning or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=variable+valve+timing+and+lift+electronic+control+pdf In PDF document text
    • http://files.uowl.org/uploads/1/3/1/6/131636903/bigurimim.pdfIn PDF document text
    • http://files.jynxmonroe.com/uploads/1/3/1/8/131857199/nobovuzofepusoruru.pdfIn PDF document text
    • http://mafanejo.cemmethod.net/uploads/1/3/2/7/132740494/0be936f9fae11.pdfIn PDF document text
    • http://files.theeastwestco.com/uploads/1/3/1/4/131483830/vupiwejizexera-figofo.pdfIn PDF document text
    • http://files.theaterinthewoodsvt.com/uploads/1/3/0/7/130776148/xarazu.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/1/0431/8180/1629/files/vipekazuxafogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/25664813256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/paint_jobs_on_1963_chevy_pickups.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/zujogexijikikidukotub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/4408617432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/66595688023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0631/5931/files/bosquejos_de_sermones_para_predicar_en.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/dulapul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/27839407869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3183/8368/files/gugalapuverunepixupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/xifoxuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/aerobic_biodegradation.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D8 9628 bytes
SHA-256: 70656b68ca9c260ba4ca46a92a3ec1da2176ebecb3474fcf181396d2ccaf1651
font_01_sfnt_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 5460 bytes
SHA-256: f72bcea43c8b743599eab9ec76126713ed180eadf18de273d9d331dd73481365
font_02_sfnt_off0000e790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 10024 bytes
SHA-256: 891237add76e74cce77b1ac7b7b2af4dc8e2cfcc23d60fb888750062517daf99