Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba6392bcb6fc8a4…

MALICIOUS

PDF

48.2 KB Created: 2020-08-18 15:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd85c51948929d5bcc0d58750a8a7b9b SHA-1: 360d45bd98b1aaf6b3d15480f2ce89041093e310 SHA-256: dba6392bcb6fc8a44091571941929536e91bf597a0e75fc76dbae36e701eccb4
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on ttraff.ru. This heuristic indicates the document is designed to redirect users to external, potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the link farm is sufficient evidence for the attack pattern.

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=her+2013+parents+guide In PDF document text
    • http://files.djspizza1.com/uploads/1/3/1/0/131069824/87516f071.pdfIn PDF document text
    • http://files.kansascrappieclub.com/uploads/1/3/0/7/130776205/dawosawepawusim-robilub-govumilukawe.pdfIn PDF document text
    • http://files.creativeservices.us/uploads/1/3/1/8/131858592/51c51b995ecc.pdfIn PDF document text
    • http://files.theroundhousefarm.com/uploads/1/3/1/8/131856163/9965101.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/1/0429/4787/0876/files/78790158309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/fezaxalageguku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/jurelevuwofiwegofirenum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/6879294439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/94252841057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/mexezapagiwiwupop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/convert_3d_model_to_step.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/zesexopizegeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/fluke_787_manual.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_off00007d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D35 5548 bytes
SHA-256: 02d2162024043e3f6563c04ba3efb566a59c231fed5d6eb7e27c32009df787cf
font_01_sfnt_off00009014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9014 10604 bytes
SHA-256: 4e10a2b98cdd9a485259ccab344539180d637404ac6ae81c081458da2883a8b9

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