Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c42ae0e0f3656fa…

MALICIOUS

PDF

47.8 KB Created: 2020-08-28 08:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 373e8bbe61bc97c6beba29710d53165d SHA-1: 86dd3db01afbb47df620506b60e56bf14dfc6129 SHA-256: 2c42ae0e0f3656fa49ae63547bf2862a6ed85eecb4c2542c23ef898a192b0866
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting an SEO poisoning or phishing campaign. The primary malicious URL identified is ttraff.ru, which is known to host redirector infrastructure. While no scripts were extracted, the sheer volume of links and the specific redirector heuristic strongly indicate a malicious intent to lure users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=flame+painter+free
    • http://files.merwininsurance.net/uploads/1/3/2/7/132740536/7129400.pdf
    • https://cdn.shopify.com/s/files/1/0466/2702/9157/files/71310541347.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/black_roots_science_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/sufekomagarob.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/min_heap_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7426/files/probability_tree_example_and_answer.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/mizipabesexokezopuguv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/bageburofipojepobuxirab.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/95779816856.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/7435358175.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/90946809369.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/81713653364.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/lujakufupivasujiroliseliw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006242.bin
9e5c7f64293b223e4efd01a85f7c384feeb282e160d9175f9b9af3fb1f944550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 4020 bytes
font_01_sfnt_off000070a5.bin
413c2e3f54df9f12f271d3d5e7c1c235b5e0bf4b20b1a7b9d039ed2e243c1a2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 4500 bytes
font_02_sfnt_off00007fc2.bin
a00d51feeb154f9481b70419a9112a69b93b2635c7d5b0973a75904ae2caff55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 10608 bytes
font_03_sfnt_off0000a41b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA41B 4324 bytes

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