Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfde6ce3bfb3da3…

MALICIOUS

PDF

44.5 KB Created: 2020-08-01 19:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d4712d4672f8299732df9bbe9f4a062 SHA-1: 17a9b0e4c002a28dd1815412cafd9027df97207f SHA-256: edfde6ce3bfb3da3edf202cd134a0677784e21e0a480847ac0d37752e624f45f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to direct users to malicious infrastructure. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector appears to be the malicious redirection via embedded links.

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.cc/pify?keyword=rewritecond%2525%257B+request_filename%2521+f
    • http://files.themadshutter.com/uploads/1/3/0/7/130775784/zafudezomoroka.pdf
    • http://files.greenejunglefarm.com/uploads/1/3/1/4/131452841/307981.pdf
    • http://files.kueadressesdesign.com/uploads/1/3/2/3/132303013/sopesesop.pdf
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1063/files/shadowrun_hong_kong_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/79313366649.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/98697133425.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/38665108786.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/fuck_you_in_morse_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/78204551163.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/26519521586.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/buzofuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/wavuniba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.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_off00005fb0.bin
9b58d7e4f38420e084f9fe996d2fb8db6dfbf0abd214680167904bbd4eeaede1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB0 5728 bytes
font_01_sfnt_off00007328.bin
8e780e1fedbe008f6d5047742e8e39be70799d6b47303adb0964622bfc220459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7328 10636 bytes
font_02_sfnt_off00009746.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9746 4324 bytes

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