Malicious PDF — malware analysis report

Static analysis result for SHA-256 27698718a6c8f9a8…

MALICIOUS

PDF

56.0 KB Created: 2020-08-20 12:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68b177fc5a18a5ab2d4058df0579e626 SHA-1: 76aae0f758641a7855006b4c1dfd8719cefe0c28 SHA-256: 27698718a6c8f9a89b6aa0f741f831d484dc9182aef4ee5a0ca0a47991dc1044
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious or unknown domains, indicating a link farm or redirector strategy. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=algebra+1+math+answers', suggesting a lure related to educational content. The presence of numerous Shopify-hosted PDF links further supports the link farm tactic.

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=algebra+1+math+answers In PDF document text
    • http://gujanaked.islgrads2020.com/uploads/1/3/1/3/131384424/tonaro-ropuwab.pdfIn PDF document text
    • http://files.pazangallery.com/uploads/1/3/1/3/131379037/dibefomovapatosom.pdfIn PDF document text
    • http://sutegu.rowdygainesmastersclassic.com/uploads/1/3/1/3/131384260/8167732.pdfIn PDF document text
    • http://mavuram.citizenscholarsinstitute.com/uploads/1/3/1/6/131606505/vikelo_vogonotowe_xuwexobevuvew.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/1/0433/3384/5150/files/7325203032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/nuwupidofawisorimemiwab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/comment_joindre_un_sur_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/judavefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/avner_friedman_advanced_calculus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/95654975704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/anemia_who.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/glandulas_suprarrenales_funcion_y_hormonas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/strategic_management_book_mcgraw_hill.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_off000093e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E2 5372 bytes
SHA-256: f23a0819af3619415f7aa0ed7250c91fd4bf282cfca82b5a5c21a758a51d6165
font_01_sfnt_off0000a613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA613 14268 bytes
SHA-256: a7c3d95246d8ed19c287afb555ad95c440562ca39a010e44ecf10e580895c121

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