Malicious PDF — malware analysis report

Static analysis result for SHA-256 91aa9f57f35c7e5b…

MALICIOUS

PDF

39.1 KB Created: 2020-08-08 17:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cac469dff62d561414aaa44c961fd307 SHA-1: 6e715e9fd9f6312ce8cb2af7d5a2ca3fda8f07b5 SHA-256: 91aa9f57f35c7e5b7020e3e7fdeea262e3099aa6e6db9691cf7fca2e62585785
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a high number of embedded external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to potentially malicious or phishing content through a chain of redirects.

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=cuerpos+amilaceos+pdf In PDF document text
    • http://bufakogo.jordanmclayton.com/uploads/1/3/1/6/131637257/pemuseloxuni.pdfIn PDF document text
    • http://files.revival42.org/uploads/1/3/1/4/131407138/4a9bfe.pdfIn PDF document text
    • http://files.theclaypen.com/uploads/1/3/1/8/131871849/13c311a1c5.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/1/0430/9486/8122/files/52346122384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/lazalarobiviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/clark_c500_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/xanevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/puzafoxulokedidomenapok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/vopanukegus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/linimapatazanaborewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/classification_non_alcoholic_beverages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/lubep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/91242893790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/wagapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8960/6294/files/3663414252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3762/0386/files/12263384571.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 2

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_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 5208 bytes
SHA-256: 8c8364e73e7893f85ffa3919121a054feb07537fc58e08c4660200237aedaf22
font_01_sfnt_off00006d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 10444 bytes
SHA-256: 567d8ace24a38f5b3f3adc8ccaaf4931e360d234fd1ed9eae48da837bec7f05b

Open this report in the interactive analyzer, or submit your own file for analysis.