Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e78cd4c72cb455…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 11:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a50dc23ce2b5780c736bdd553f4f131e SHA-1: e6a2640e6da4808b7b03073815a2bfc64ff4db76 SHA-256: c8e78cd4c72cb455f4ceb36e93c1c7b9dcf917312bd4effff46ae739d5a6d651
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is used in a lure for free software downloads. Additionally, a large number of external PDF links were found, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that appears to be part of the redirection chain.

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=editing+pdf+file+software+free+download In PDF document text
    • http://files.spiritofthe8thfire.com/uploads/1/3/0/7/130739371/64d918.pdfIn PDF document text
    • http://files.avacone.com/uploads/1/3/2/7/132740293/44129509e5.pdfIn PDF document text
    • http://files.westsideindustrialpark.com/uploads/1/3/0/8/130874276/5507050.pdfIn PDF document text
    • http://files.shandeezcollectiv.com/uploads/1/3/0/9/130968984/kewugifo-pulodabimog.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/1/0440/6280/2070/files/80884315594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4050/4999/files/que_son_los_chakras_y_para_que_sirven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/92273061305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/34356609401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/41771132421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/77127944094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/39223045063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/46594457216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/kopekoxinigowep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/palaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/zivuregejasudadijozolaxep.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_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 5256 bytes
SHA-256: 6c13141554b3303905fa31dea51c6b341c39bd58b68a22c432568e4642efa879
font_01_sfnt_off000076b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B2 9932 bytes
SHA-256: 19fae8ef8347d709bcd1e7269eab938509b1a17fdc9ea6acb6963b90f34e81fe

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