Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9c08958265a111…

MALICIOUS

PDF

54.4 KB Created: 2020-09-02 04:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 045052ec4b06323c7b84054c8a57fb62 SHA-1: 6e359658629ca19ce8a6a2d2c3d8f66a7ba1fde7 SHA-256: 6c9c08958265a1119c9d4c9b8da0186e469e2014daedac720d94242fa055ddb5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=marasmus+treatment+guidelines'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is malicious. The presence of a 'download button' lure further supports a phishing or malicious redirection attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=marasmus+treatment+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/demezowosiduvuliba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/beyblade_games_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/tafamotusewekavosez.pdf
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/32822176733.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/goxeposenigokewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/anjali_tamil_movie_songs_masstamilan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/47008368006.pdf
    • https://cdn.shopify.com/s/files/1/0440/2626/5765/files/23113272904.pdf
    • https://cdn.shopify.com/s/files/1/0436/4002/9344/files/porevodotuzodenifezoneb.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/tivixika.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/zip_code_lat_lon.pdf
    • https://cdn.shopify.com/s/files/1/0438/4381/3538/files/anime_couple_wallpapers_for_android_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0435/3091/1899/files/refonitovidit.pdf
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/donod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2037/files/fuxowusuteguluz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000980b.bin
a6cb97650409e140c8f5958aa99b9904d21fbcdb243d0832e6eb99fb7c579a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x980B 5148 bytes
font_01_sfnt_off0000a97f.bin
24b76e2de1201f301cf808fdde12d84ae2b32f3f707286a81eedd5d4f45db7bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA97F 10404 bytes

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