Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b1e4223d15abeb…

MALICIOUS

PDF

41.0 KB Created: 2020-08-25 21:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7bd45b17c9a24a9302c4d69a10b42f9 SHA-1: ae2d0963e860f355de3d31cc113d6c0570944945 SHA-256: 18b1e4223d15abeb395c7d49785bc2bca61b081b720dc1142bde615efa97dcd2
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service (ttraff.ru) known to host malicious content. The document body itself is heavily obfuscated, but the presence of multiple external links, including a link farm, strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

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=the+defining+decade+meg+jay In PDF document text
    • http://litobofu.southmadisonunite.org/uploads/1/3/1/4/131409236/tamirodetew.pdfIn PDF document text
    • http://komaxumu.columbusdogconnection.com/uploads/1/3/2/7/132712663/kafefak.pdfIn PDF document text
    • http://files.howtobeaweddingofficiant.com/uploads/1/3/1/4/131482823/juriresejasosatofu.pdfIn PDF document text
    • http://files.berghutteskiclub.com/uploads/1/3/1/4/131484133/nawiro.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/1/0429/9345/1159/files/fundamentals_of_computer_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/rekinus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/83384281681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/pidelisezirimipex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1285/7754/files/charged_quartz_crystal_gw2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/smok_alien_220w_tc_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/45817526128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/72971692343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/18357407145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/vitukegupek.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_off00006340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5256 bytes
SHA-256: cd56d11b21de5937306122aae8d15ce0fbdbf79f98007a6f8f56d49ef401f15e
font_01_sfnt_off00007507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 10024 bytes
SHA-256: d104309d950674e42eb91c532d4670767843cf06b989a7017460dda4cb6326e4

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