Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d71be44f98851a…

MALICIOUS

PDF

38.1 KB Created: 2020-08-20 23:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a755b3adabd5bb32514fa12c7dc74ba SHA-1: b16b44c4e50559097bd6ea098c896f8064740e32 SHA-256: 90d71be44f98851a08536d2cc93d20397408c27c81a9d1c0f67aef942c7ad79d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a technique often used for SEO spam or to direct users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=categories+for+working+mathematician+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute content through a link farm, ultimately leading to malicious infrastructure.

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=categories+for+working+mathematician+pdf In PDF document text
    • http://files.i2cafe.com/uploads/1/3/0/9/130969580/japobejezisuj.pdfIn PDF document text
    • http://nobof.eclecticcolour.com/uploads/1/3/1/1/131164250/26758.pdfIn PDF document text
    • http://files.soapbarlounge.com/uploads/1/3/0/7/130776718/luriza_bokitewakikizu_sepipe.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/1/0432/5657/8212/files/pathfinder_monsters_by_cr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/72879631850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/lajaberikuvubonewakiwali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/32873651413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/54029139968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/wodusimadikinagik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/primary_english_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/protein_structure_levels_of_protein_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/dj_wale_babu_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/45796419529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/kamus_bahasa_jawa_halus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/37722289361.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_off000054fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54FE 5596 bytes
SHA-256: e7b989c455f1d3d816a3afdbbe519fbbdc76243484d56509cc56b672078bcb06
font_01_sfnt_off000067f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 10340 bytes
SHA-256: 2fa9de01789d266fe3d6b1649cb1e7d240ca0ce5c1fd9a25339e38dc234547ce

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