Malicious PDF — malware analysis report

Static analysis result for SHA-256 91273be1d812c360…

MALICIOUS

PDF

39.4 KB Created: 2020-08-15 06:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ea3c75b542789ca3f624eca2fe28ee3 SHA-1: 174f167b22ad0064aa23c2aa5dc0cbe50c598b2f SHA-256: 91273be1d812c36097c88e64d7164652858d5af1e49f575d851f5dc834c006d3
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a guide to bypassing Wi-Fi security. The document also contains a large number of embedded links to various PDF files hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=cara+bobol+wifi+no+root+apk In PDF document text
    • http://files.volunteerconnectnow.org/uploads/1/3/0/8/130874317/5f60e505dddde6e.pdfIn PDF document text
    • http://files.nomadicsteve.com/uploads/1/3/1/4/131437538/42cb4690f8.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/1/0438/3634/2434/files/xaxuzirakekuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/49149428252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/pefofejufoxozejaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/indoor_swimming_pool_construction_details.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/sovipavomefet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/8708961853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2655/4781/files/nuvozipuninav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/dnd_5e_tiefling_subraces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/92930326906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/cctv_installation_training_courses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/66838539677.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_off00005df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF6 4916 bytes
SHA-256: d262ceef3d1fa0796da4a14ff999db1a7562bf945d310997de3bf740b32e398a
font_01_sfnt_off00006ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED5 10088 bytes
SHA-256: c0f8379feb7a8ce0d24a9e1b0573a3dbfd374f4ad7456803a6b2e80270c14a99

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