Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd2c80400a2653a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-24 07:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f233e9e821ed42adab87011b50e36fb4 SHA-1: bd88abcc847d12601a872c14a46e1df596d90568 SHA-256: 3fd2c80400a2653a4da689b1fe5d6151a5ba620add951a2e93f4ed8576a7c2ea
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, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=manual+drone+visuo+portugues+pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily corrupted, contains fragments of the redirector URL and other PDF links.

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=manual+drone+visuo+portugues+pdf In PDF document text
    • http://files.lo-phi.com/uploads/1/3/0/9/130969700/bb20ff7a8b6d2.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/1/0432/3196/9438/files/furogusutabulil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2733/1232/files/76823214722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/kuregu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/7023/8370/files/best_reader_android_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/simple_biodata_format_for_job_fresher_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/pour_le_libralisme_communautaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/anlise_swot_definio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/49591055863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/45195396202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/public_administration_course_outline.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 3

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_off0000553e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x553E 5272 bytes
SHA-256: c24acbb57e92f6f01148dd4299f0f1fb33552a0f211ec4e623952125703f2667
font_01_sfnt_off00006748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 15400 bytes
SHA-256: 3ab96026fee2c0f8fb56359403a42d4276eb740aa7843beef75d19b8ccc676d1

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