Malicious PDF — malware analysis report

Static analysis result for SHA-256 6631e5a8234c202b…

MALICIOUS

PDF

38.2 KB Created: 2020-08-03 14:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b3420e48a1aa40e0f2e09fcea20c8e0 SHA-1: 9a5dcec42ac7cc4e61dca286b7bc3cd2430b3549 SHA-256: 6631e5a8234c202b657326dc2f32b8a0887db98f2d98bc640fc0e444b5520d51
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of an SEO link farm designed to lure users into downloading further content. This suggests a phishing or malware distribution scheme.

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=camberwell+assessment+of+need+forensic+version+pdf In PDF document text
    • http://files.ukcamperhire.uk/uploads/1/3/2/6/132682303/4929cfc58f8.pdfIn PDF document text
    • http://files.junepalmervividarc.org/uploads/1/3/1/4/131438456/jubuvebab.pdfIn PDF document text
    • http://files.bltsnv.org/uploads/1/3/2/7/132740659/nefedofagubivoniza.pdfIn PDF document text
    • http://files.customcrushfitness.com/uploads/1/3/1/4/131454521/lazovanuwejam-zuwugupulur.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/1/0438/9103/2216/files/39850171869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/vetifixerosafovesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/21058371639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/49436866180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/pofidowazigafat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/patenamigupisaxege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/vetapexonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/79997759679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/77695013740.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 8

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_off0000560d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x560D 5496 bytes
SHA-256: 47e4a0b9c1f6048748b113c8ecf981c0ac54856db606a65a7351c75796651f91
font_01_sfnt_off000068b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 10244 bytes
SHA-256: 1c185107699c3701679ef86ea4d8c14b6426dbe33532aff147d15d186b448843

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