Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa0acd6edb12e7d…

MALICIOUS

PDF

32.9 KB Created: 2020-08-09 15:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a74e3b4fb3ef2778ae6944cafc80d7e SHA-1: 54859514590c09b1a0d090cacab7198ea3aa2f7a SHA-256: 7aa0acd6edb12e7d8768f4d83ada5828e8f76948cab51f28afd46592075faac4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=ordinal+numbers+dates+exercises+pdf'. This URL is embedded within the document body, disguised as an academic exercise. The file also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of SEO link farm abuse. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=ordinal+numbers+dates+exercises+pdf
    • http://files.ameliaeventrentals.com/uploads/1/3/2/8/132814097/3cb424b4e2f.pdf
    • http://nowev.lilyandlous.com/uploads/1/3/1/1/131164250/8ff8c97.pdf
    • http://files.mval.org/uploads/1/3/0/9/130969322/sejumero.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/rubamomifuzopagazopupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/14663479118.pdf
    • https://cdn.shopify.com/s/files/1/0431/9756/3037/files/mutupotipubojubixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/zobep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/rejotobelib.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/sasimiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/89887413883.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/gogam.pdf
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/89564116083.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/50716644471.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_off00004344.bin
7b7b9673aad81fa387a36813c4785c7cb35d8e975282f0edb87ee19d21a34471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4344 5536 bytes
font_01_sfnt_off000055f9.bin
683467276a46da39d342239c5f238764f5a1854ce690e7ab79878fcfd796fdb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F9 9748 bytes

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