Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f7cd4d44af9778…

MALICIOUS

PDF

38.4 KB Created: 2020-08-14 14:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde55f734e35ae5ba9c22bae2510c85c SHA-1: 38ae651f05d2a0bd6a7a2e498de221e257861a3b SHA-256: e8f7cd4d44af977899af03c51dee03fcfe7180d7f20aa72f5d67c36270ff5710
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=cloud+atlas+sextet+sheet+music+pdf`. This indicates the document's primary purpose is to lure users to a potentially harmful external resource. The presence of numerous other links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates to the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=cloud+atlas+sextet+sheet+music+pdf
    • http://files.brswest.net/uploads/1/3/0/9/130969842/8803294.pdf
    • http://files.shannonmariemakes.com/uploads/1/3/1/4/131453193/resugajunarosibobopi.pdf
    • http://mozowafu.henriquebgomes.com/uploads/1/3/0/7/130775085/57039.pdf
    • http://files.wetspotfl.com/uploads/1/3/2/6/132681517/butewasilig.pdf
    • https://cdn.shopify.com/s/files/1/0455/3277/4565/files/online_shopping_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/72001930708.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/best_online_editor_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0444/5339/6647/files/business_proposal_format.pdf
    • https://cdn.shopify.com/s/files/1/0452/9225/7441/files/suwanoxisilavonepoxuwumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/lifop.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/8944596220.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/7259762521.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/rikudataxow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.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_off00004a88.bin
b636496046e2b854f679b3f6c57bc97a9e06045cb30db8cbee9582564f9f9eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A88 5272 bytes
font_01_sfnt_off00005c63.bin
ef3dd150bd70f892b5a64ff2f9641ae35f1d0165c2efb40a3e31377d1005a46a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C63 14804 bytes

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