Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9125a90417d287…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 08:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06cd98526fe922a79a03b191b186f834 SHA-1: d4dd086f931c66c296762c1c733869b12fbcd554 SHA-256: 3c9125a90417d28764bdb7b523e4173eea6f4fbd5f6bf0d408ffb8d767ceda98
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure. The document body and embedded links suggest a lure related to 'Puzzle android games', intended to trick the user into clicking the malicious URL. The ML classifier also 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.cc/pify?keyword=puzzle+android+games In PDF document text
    • http://files.pointtv.org/uploads/1/3/1/1/131163780/3a264046b2607a8.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/1/0433/8545/4750/files/mopaxokimukepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/61701195457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/79881953830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/nugef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/sosolabogunejipifufide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/78597538571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7124/2389/files/57840131937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/golevomeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/reflection_refraction_diffraction_interference_practice_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/domakoganumur.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
🗂 Part of campaign: askweklar.net 3 samples

Related samples 1

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_off00006186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6186 5196 bytes
SHA-256: 24c4d3404a7a9471a89be3d8ac6070507f15d0b27e8c147f6d3123fa32b36461
font_01_sfnt_off00007321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 10212 bytes
SHA-256: fde4e95f6232deca95d088ecb345abc4d0cda45e3500c15438ccb01ae8e10694

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