Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c16c482dcec7abe…

MALICIOUS

PDF

58.9 KB Created: 2020-08-06 04:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9522fbc198c3caab74afc9fe353030dc SHA-1: c9e7646d396816f8368f93a2b9e583b3acb86857 SHA-256: 6c16c482dcec7abe5b77b6362dd366e079769bed831204b1025230c1deba4852
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to attract victims.

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=seismic+interpretation+basics+pdf In PDF document text
    • http://kexav.stocktonkiwanis.com/uploads/1/3/1/3/131384429/5993658.pdfIn PDF document text
    • http://files.mhrspl.com/uploads/1/3/1/4/131407424/revegatotarigakupaz.pdfIn PDF document text
    • http://files.gardenspotrentals.net/uploads/1/3/2/6/132681938/finefenusavat.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/1/0435/1678/8900/files/jedolifuneromefan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/71208128661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/jutizenisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7801/6421/files/allis_chalmers_wd45_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/gitekiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/46972283885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/36562496723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/nitibumonexalado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/saziz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/dadat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/73644620691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/67875436134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/85862100985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/61319422617.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_off0000a8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D7 5512 bytes
SHA-256: fec84d656584ce7d260128c61460235dcd69f9bdb7c166fb823bf6b72511bcbe
font_01_sfnt_off0000bb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB77 10192 bytes
SHA-256: 937c75ef209a3f885f57bbafdb6261771e1939c7e2e8465c3c56c92d9eefab73

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