Malicious PDF — malware analysis report

Static analysis result for SHA-256 402d9ba7080ec842…

MALICIOUS

PDF

38.4 KB Created: 2020-08-26 22:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8796b4eb542f299a04bc914c2796a7 SHA-1: f9c5b0fa63ef967969255ef4cde911727e637ffc SHA-256: 402d9ba7080ec84200611a269dacee45273bbb501d0fc281b2ffc89576e5bd4c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the primary malicious URL, indicating a likely attempt to redirect users to harmful content.

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=flexus+trumpet+pdf
    • http://zavugij.nutritionandhealthfiji.com/uploads/1/3/1/6/131637881/6425060.pdf
    • http://files.quixotecommunities.org/uploads/1/3/0/8/130874233/dosexisalimag-zuvowizadesupa.pdf
    • http://files.dukesfootball.com/uploads/1/3/1/4/131454549/5c147e9af.pdf
    • http://files.exquisitepeace.com/uploads/1/3/0/9/130969270/nabimik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9818/files/44717216752.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/gagulagilafakuva.pdf
    • https://cdn.shopify.com/s/files/1/0451/6734/5818/files/43735561355.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/gakimazux.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9458/files/zosupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/indesign_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/nofefevajifumo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4161/8082/files/civ_5_difficulty_levels_multiplayer.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/homestead_exemption_fulton_county.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/bisimorerilafiz.pdf
    • https://cdn.shopify.com/s/files/1/0462/3305/9479/files/kujelagexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6575/3241/files/82555188593.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/dalerutudirimakapobi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005884.bin
44e516bac7f525572dca6431d1d3497fe35f71767329752e806f053605d3a5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5884 5000 bytes
font_01_sfnt_off00006975.bin
25e3653ccf0319e748eed7155596c15bc43217a8eb70c0b5f870c78dbfc9d3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6975 10328 bytes

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