Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed9cb10e24275ed…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 12:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 998c65ebe7205a33a0a0a3b0e0dd4325 SHA-1: 561c33bd2f005dc0bda8ddbe0d116754b21f968c SHA-256: 2ed9cb10e24275ed376e9f23d1dafbf432839fede9cd9968d83a9b7b07e0e139
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that masquerades as a download for "bachelor pad plans pdf". This link, `https://ttraff.com/pify?keyword=bachelor+pad+plans+pdf`, is designed to lead users to malicious infrastructure. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=bachelor+pad+plans+pdf
    • http://vusisud.smbwholesale.com/uploads/1/3/1/4/131453278/fagijevipebabalinego.pdf
    • http://files.inversitymodelmanagement.com/uploads/1/3/2/3/132303359/753f494073213.pdf
    • http://files.eastcountyrfc.org/uploads/1/3/2/7/132712057/pigixomar.pdf
    • http://files.trueyoufitnesstraining.com/uploads/1/3/1/6/131606128/5483211.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/53589295209.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/31561073768.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/dilumek.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/wadinuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/attack_of_the_b_team_servers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/bumotaxatibiwosipeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/mesogolutaximaruxamo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/komilorunidanepan.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/20444159171.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/gaxopej.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_off000061c5.bin
3a6ca10b461e933eba5c3e602fee81073711d319d5552fa35e23a04d3f994338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C5 4952 bytes
font_01_sfnt_off00007283.bin
f9f1aad759ef972694cbe68fe567f5a47c836ab800a0d2dfb06dbd2c389da00c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7283 9936 bytes
font_02_sfnt_off00009478.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9478 4324 bytes

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