Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c515a658e797643…

MALICIOUS

PDF

39.6 KB Created: 2020-08-04 00:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41803cde9ce7d3864c0579a8e7165028 SHA-1: 6a36537b57fb2f1ebb033cdb5f69ccf5e86ab600 SHA-256: 5c515a658e7976430d71ea8b38728aef9f5f68ec558b88c595f3ede14cb7c3b3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, many pointing to a malicious redirector infrastructure. The document body, though obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=diet+for+celiac+disease+pdf', which is also flagged as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=diet+for+celiac+disease+pdf In PDF document text
    • http://files.tradeofgoodfood.com/uploads/1/3/1/4/131438423/2719833.pdfIn PDF document text
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdfIn PDF document text
    • http://files.decipheringtheuniverse.com/uploads/1/3/2/6/132696285/bupijasakebuzi-nunurawaposuzo.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/1/0432/5897/0280/files/fokebidosipumezepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/60577239869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/avi_to_dvd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2544/7587/files/ftb_power_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/44258644675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/kakopanaxomugikuruki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/pitorojugavagurilapuzon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/51280733908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/69198772039.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_off00005e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8A 5148 bytes
SHA-256: cbe56e96085e09e01ce1e513b3baf7d5e7bc9918d52c3f04419b0d8bbafaed77
font_01_sfnt_off00007026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7026 9824 bytes
SHA-256: 5a961256170e2a9fe8aabe9bdd4f6a6f697624a502f95ef6b66780330be434ca

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