Malicious PDF — malware analysis report

Static analysis result for SHA-256 774319f250f19d66…

MALICIOUS

PDF

37.7 KB Created: 2020-08-10 17:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9351d4cf249034bf9672e8995b573323 SHA-1: f1c3f2a1d61cfcc53ca1c1c7378b7128f3fa0ebe SHA-256: 774319f250f19d666481897bc64b95e745e96b4e427e01dc2af3450e09cb32b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.cc'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead 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.cc/pify?keyword=scratch+programming+games+pdf
    • http://files.mareacraig.com/uploads/1/3/0/8/130813982/2356776.pdf
    • http://files.dreevin.com/uploads/1/3/0/7/130738712/punenifetevo-titaxiwup-rinef-kadegodekazare.pdf
    • http://files.nightwispdesigns.com/uploads/1/3/1/3/131379894/2491363.pdf
    • http://files.cliochris.com/uploads/1/3/1/8/131857626/549328e961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/sobrecrecimiento_bacteriano.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/95884081261.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/67089355626.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/silent_planet_panic_room_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/59813441613.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/rogadok.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/dipovujubanozakutubitub.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/maruwixuxud.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/3124647509.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/22752384374.pdf
    • https://cdn.shopify.com/s/files/1/0428/9583/5295/files/36039798732.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/star_wars_battlefront_2_1._3_patch.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048ec.bin
f4e00665c89668cedc044be8c64c4d74783aca2247ef2b544d4184fc709d2641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 5428 bytes
font_01_sfnt_off00005b2c.bin
5f8b13bf420c7dc11741eb2acfb34c1aa5c8676b0fd475f8b6244bf36a8a724a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2C 9384 bytes
font_02_sfnt_off00007b4f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4F 4324 bytes

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