Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda660ccaab97a52…

MALICIOUS

PDF

42.3 KB Created: 2020-08-06 21:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 994876b477070d6615b3438f3fbb894e SHA-1: 659e3f6166e8cd42ef930510165f402eea81a61b SHA-256: fda660ccaab97a521749266a05a44140af27efc73af55158806f519de4697b67
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary URL, https://ttraff.ru/pify?keyword=aircraft+conceptual+design+raymer+pdf, is identified as a malicious redirector. The document body is heavily obfuscated but contains references to the redirector URL, suggesting the document's purpose is to lure users to malicious sites.

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=aircraft+conceptual+design+raymer+pdf In PDF document text
    • http://files.trialinnovations.com/uploads/1/3/1/3/131383743/lisaponigowuxi.pdfIn PDF document text
    • http://farigoxug.cfcspain.com/uploads/1/3/2/6/132682897/5ae79c90.pdfIn PDF document text
    • http://files.grannylou.net/uploads/1/3/0/8/130814960/daxozabi_falegobara_samizosolobo_soxedifuja.pdfIn PDF document text
    • http://files.dogsinks.com/uploads/1/3/1/4/131437041/2664419.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/1/0437/2873/2314/files/38517927066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/pewibugodirukarolojoline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/40620382100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/bristol_stool_chart_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/15162851450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/43224397023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/50856352947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/94806022709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/80677691595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/computer_age_statistical_inference_efron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/49534149295.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 5

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_off00006497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5564 bytes
SHA-256: 7dfc905cc02d837ef26ebae4fc5a17c41cd421169915f76849926c89d308c330
font_01_sfnt_off0000777d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 10868 bytes
SHA-256: fa1e6723e24f63ca12c625d7041f15d21cafa36da2ef4b5b23fba04a07e4ea71

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