Malicious PDF — malware analysis report

Static analysis result for SHA-256 437c8a508ef78d1b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-05 14:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 412985af90cfb900a6742e9b42d615be SHA-1: 42ce0dbe163bca777547f887db3850b67169c94d SHA-256: 437c8a508ef78d1b85dfcbad495193bab069d084865d34077eecd84be287ff64
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=business+report+writing+examples+pdf'. This link is presented within the document body, disguised as a business report, likely to trick users into clicking it. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to increase visibility. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirection to the identified malicious URL.

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=business+report+writing+examples+pdf In PDF document text
    • http://files.compressfirstky.com/uploads/1/3/1/3/131397927/xizafi-galomufawedo-gumovipusivu-kuvaxufagon.pdfIn PDF document text
    • http://files.thaisrussomano.com/uploads/1/3/1/3/131381839/1092220.pdfIn PDF document text
    • http://files.sterlingartsanddesign.com/uploads/1/3/0/7/130740429/5991070.pdfIn PDF document text
    • http://files.majesticentertainmentinc.com/uploads/1/3/2/6/132681464/14901bb54baea.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/1/0433/1818/2041/files/pattern_making_books_for_fashion_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/segimaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/71531643531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/70528403988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/rurovutarovowiwidudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/watch_gotham_season_3_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/lucky_block_mod_1._8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/steampunk_minecraft_texture_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/wobusiperovukanebutakit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/paduxorasezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/kanoparijemofedise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/59881125691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/pedejafepenipaxipubakar.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 5568 bytes
SHA-256: e7d7dae02bb0f90cc5afe426bf9e39497a2a1c13f97916d29503bb5d2effc07d
font_01_sfnt_off0000880c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880C 10604 bytes
SHA-256: 5862b91325902b43114f28565ff9abd95076d98d9b88841e2ab994f1ffd48e5a