Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e8e4ab4ebfab09…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 21:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a82ee37e5452c8633672577b5ff005ef SHA-1: 4e2c894579d892eb43dcf338ae09a99966cb59fa SHA-256: 40e8e4ab4ebfab093aa6435534d9f711376de736fabff0c9e6384fc5432661ad
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=cambridge+complete+pet+pdf', which is flagged as malicious. The presence of a link farm and the ML classifier's high confidence further support the malicious nature of this document, likely intended to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cambridge+complete+pet+pdf
    • http://xanam.jamiefellows.com/uploads/1/3/1/4/131408229/kimelirazibuxur.pdf
    • http://gosamon.konstantinthepianist.com/uploads/1/3/1/8/131856161/barunorekadi.pdf
    • http://mutoru.peacecorpsunion.com/uploads/1/3/0/7/130776340/toxera-gusuvulon.pdf
    • http://files.miam-foundation.com/uploads/1/3/1/4/131437299/8260127.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/50537047482.pdf
    • https://cdn.shopify.com/s/files/1/0457/3636/2140/files/showbox_apk_2018_android_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0438/9512/8216/files/xosur.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/muzusuzegagapum.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/virtual_villagers_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/vegan_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/caracteristicas_de_las_ciencias_formales.pdf
    • https://cdn.shopify.com/s/files/1/0447/9349/5709/files/86406379701.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/dendrobium_orchid_care.pdf
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/20094996895.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049cf.bin
85b7441ae108782eb679a2aaeb96ad910fc80704f7af43b01dafcbde5117978d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49CF 5140 bytes
font_01_sfnt_off00005b50.bin
c3bfec8b1aeecb011c1705bc4c7bf3ff3e2678ad8a1b6d0bfbdbcd35ab876e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B50 14164 bytes
font_02_sfnt_off00008765.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 4324 bytes

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