Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a591512bdaf0c5…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 18:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2560393b2fb1c4dadc3a74a0fba4e34 SHA-1: fcae12bd1d3e5685698ffd63eb609411ebc2f089 SHA-256: 00a591512bdaf0c539d1771b801727f396c486ef64d7c7737606acc999030338
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. This suggests a link farm or SEO poisoning attack designed to trick users into downloading malicious files. The presence of a malicious redirector URL and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

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=statistical+inference+theory+of+estimation+pdf In PDF document text
    • http://files.apriljonesms.com/uploads/1/3/1/6/131637257/mutoxefub-wenisufimiwev-wotixijiro.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/1/0429/2198/4166/files/41394534767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/ht2000_motherboard_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5533/4055/files/waruzebodasuloxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/66050211884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6599/8501/files/oxford_discover_1_cd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/84062707065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/80667996632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/watimuleridenakekemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2880/5789/files/modobutanexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6447/2231/files/60188366722.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 4

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_off00005923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5923 5600 bytes
SHA-256: 9ccaa505d95c027538dba94b0c536ae1986f8866be257b9d5df4451d3e0483ed
font_01_sfnt_off00006bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 11332 bytes
SHA-256: 6276a4a45420b1c0eb136027c7004533ca6f903a58872ff8986811e17bb4af17

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