Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f2a4c2f0232a48…

MALICIOUS

PDF

40.5 KB Created: 2020-08-23 15:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b298ba67213bc6d90523eedfe4bb347 SHA-1: 1349e37fd164b3a43cbb5ea1bd3b8251fb485b24 SHA-256: 43f2a4c2f0232a486f64150765c4568f69f9ac2f00979b5ecfe560d9bda2ded1
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. Another heuristic noted a large PDF link farm, with many links pointing to Shopify domains, suggesting a potential SEO poisoning or content farm strategy. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=comment+afficher+les+formules+sur+excel+2010', reinforcing the malicious redirector finding. No scripts were extracted from this sample.

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=comment+afficher+les+formules+sur+excel+2010 In PDF document text
    • http://files.jason-molloy.com/uploads/1/3/0/7/130740325/pegapade.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/1/0435/4162/7029/files/christmas_caroling_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6690/8834/files/share_market_basics_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/29919691797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/gebajiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/piruge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/82957498070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/fimenesarudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/bedota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2384/3996/files/us_guided_interscalene_catheter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/zigota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/salon.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 5420 bytes
SHA-256: 3a0ecbc3ffc2e91b690ae77c5a16bcb48b32f8a9e329fb6355dbc698b88c26af
font_01_sfnt_off00006ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 11580 bytes
SHA-256: 0eff1aacaa718ec6430b1785e44ee1f9149d64d990e537d8d501883871f5f770

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