Malicious PDF — malware analysis report

Static analysis result for SHA-256 32efd8a3fd9d75b8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-18 22:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6665dd22cd01391bb5ad2767867aea SHA-1: 32fa72aac1906d71b5145007ecdeb9697a488ac3 SHA-256: 32efd8a3fd9d75b8f7e756ae20a94941d39ce52b594909cb15ed5d0f825238d5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as information about asbestos sheet bags. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to distribute malicious content. The primary malicious URL is https://ttraff.com/pify?keyword=asbestos+sheet+bags, which likely leads to further 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=asbestos+sheet+bags
    • http://files.atkinsreddevils.org/uploads/1/3/1/4/131407361/4b41bf.pdf
    • http://files.superbloomcoffee.com/uploads/1/3/1/8/131871704/13bc9f9b3d5a6.pdf
    • http://files.alamowebwrite.com/uploads/1/3/0/8/130815009/4101570.pdf
    • http://files.autisticpridereading.co.uk/uploads/1/3/2/6/132682919/8276601.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7516/files/how_to_root_sm-_g360t1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/how_to_make_an_ecomap.pdf
    • https://cdn.shopify.com/s/files/1/0454/3532/2526/files/rerot.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/42340951969.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/kunewokuni.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/mopun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/58306430871.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/94166673167.pdf
    • https://cdn.shopify.com/s/files/1/0430/0836/0611/files/mcat_bubble_sheet.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_off00007995.bin
4ecb1556b2fcc4f0e9d22a778ddd9e1de73b8068fdb6c7e2819bc3c7fc854871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 4948 bytes
font_01_sfnt_off00008a64.bin
3bbf4ebf5cb1caadaf9943baa295e04d350c8d0d6b3e1ae1abd95ea8cea6eebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A64 10152 bytes

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