Malicious PDF — malware analysis report

Static analysis result for SHA-256 941053e255de7195…

MALICIOUS

PDF

42.4 KB Created: 2020-08-01 12:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: efa2766ac2ca50e9a026fcf95c47b184 SHA-1: 0cf1781ceb7efe49ed771c59ca873cf7ec79afdc SHA-256: 941053e255de7195ff550818f3bbc142f7646988b84e271fc126cbf4e2476829
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a mass of external PDF links, indicating a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body contains the URL 'https://ttraff.cc/pify?keyword=python+directory+exists', which is likely the primary malicious redirector.

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.cc/pify?keyword=python+directory+exists In PDF document text
    • http://files.ironkoi.com/uploads/1/3/0/8/130873795/c6b3e610.pdfIn PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdfIn PDF document text
    • http://files.marionbridges.net/uploads/1/3/0/7/130776511/3395721.pdfIn PDF document text
    • http://files.parkplace-dublin.com/uploads/1/3/1/8/131858661/ee5820c821.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/1/0437/2509/5062/files/wenosuxusedikunoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/ruvubutaramuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/55542454294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/mitenoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/dadatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/gunojivugabuxega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/zalefizazovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8177/7827/files/lamutelaxogexose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/takajudegudadez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/xitulikuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/10703530004.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_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 4956 bytes
SHA-256: 21e42ff1756bf6c93d02bed5520e0fa49b97a33805c50adc7839ff7ac1d93fc4
font_01_sfnt_off00007b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 9844 bytes
SHA-256: 4aeef2768fd8e32e6f07c0223ba9e937c6c420803747a701749fbadc983b034d

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