Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cc0c4450b0e2da…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 01:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87a78a34d476c3121e103ea4dd961068 SHA-1: ddc6b9eff3ceacd187f49bd55e7008af583307e9 SHA-256: 37cc0c4450b0e2da25dcd0860c5431157e448cdaad77a0885dc3e5917b4499f0
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for distributing malicious content or conducting phishing campaigns. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'ttraff.ru', which is known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The presence of a large number of external PDF links also suggests a link farm, potentially for SEO poisoning or to obscure the final malicious destination.

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=abdomen+agudo+causas+pdf In PDF document text
    • http://nufod.mazamo.co.uk/uploads/1/3/0/9/130969360/tawoxediwabigon-vewaruxemuf-zujiwobaw-ruzere.pdfIn PDF document text
    • http://xisab.abullfrogstudio.com/uploads/1/3/2/3/132303382/pegidobu.pdfIn PDF document text
    • http://guwogo.togethergolden.com/uploads/1/3/1/3/131383483/zizanuj.pdfIn PDF document text
    • http://kanilom.chappellhillgardenclub.com/uploads/1/3/0/8/130874493/kumiwot.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/1/0433/6707/1894/files/15214392567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/68202570759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/zawoluduzuzik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/14151326824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/gadidelukijodufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/pumetevimivejonekexano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/jisedavavabazama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/automobile_engineering_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/chalcone_synthesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/zenubexorowumogorop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/49445529490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/52920422246.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 5476 bytes
SHA-256: cbe5402fc89dcdbed6a44f2c63da727cea1301b2c2f7ac1ba4450c38818fff9c
font_01_sfnt_off00007848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 11008 bytes
SHA-256: 7794efcd2a1e0d14a268c2dc35ea3e87f88a0f6c3573ddda3375b7c6314e7191

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