Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac8ddc7357ac7a8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 04:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69893824cd7e78044a686ae84b20ba4e SHA-1: 2ab201a3e021c37b87aa00cf54df7e74aa01cb76 SHA-256: 2ac8ddc7357ac7a8c3e23ff0493150c60c01a77a204160960d285805f4224bdb
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text that appears to be metadata and also includes the primary malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or phishing lures through a large number of generated PDFs.

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=cahier+journal+4ap+pdf In PDF document text
    • http://gebikas.whimsicallightshows.com/uploads/1/3/2/7/132710712/wunureduxawul.pdfIn PDF document text
    • http://files.alexmunroewrites.com/uploads/1/3/1/3/131384173/fovun_jixototedu_pojutebuvatevu_vibul.pdfIn PDF document text
    • http://files.etruckbiz.com/uploads/1/3/1/6/131606745/248631086ce9.pdfIn PDF document text
    • http://files.peterdurst.com/uploads/1/3/0/7/130739719/6fb0adea42.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/1/0443/3759/4524/files/konabobubasiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/riseposutukoriwunakulemoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/69589614745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/kololevopotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/63839216309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/64539159022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2610/files/71578288339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/kivulak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/ferokagoxinul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7940/1623/files/2159965787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/92604320112.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46F9 5020 bytes
SHA-256: 75e58a24fc3f4a7affa37f475329ee911b8374abda0db2d2653b29d2644847da
font_01_sfnt_off0000580e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580E 9000 bytes
SHA-256: 4640f14660750ec4e443993110a980df208dcdecc69dcc0ab485f190468a21a7
font_02_sfnt_off000076d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 21172 bytes
SHA-256: a27a082306d6c77659dad24e131b42bce4755ff0956747fe5f1ca1aedbc06238

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