Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b31d4cc91eeda10…

MALICIOUS

PDF

39.4 KB Created: 2020-09-06 15:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b8d06c1384b9e5b2069df268b6943f2 SHA-1: f195da229353ad6d9f01201c21db59e69f8c43ce SHA-256: 8b31d4cc91eeda101ca600c4c2d09513fa5643323a6675a0001f3ecfee34b08a
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free sheet music, but the primary link redirects to a malicious domain. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this behavior. The embedded URLs are part of a link farm strategy to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.me/pify?keyword=hymn+sheet+music+free+piano
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/unity_movement_script.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/answerphone_song_ella_eyre.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/gifuravesamibapafadige.pdf
    • https://static.usrfiles.com/ugd/a474dd_fad5e24cdbd14d779367304f36bb753a.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/thieme_atlas_of_anatomy_head_neck_and_neuroanatomy_2e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/jadovojujaxirufasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/jedazadetoda.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1106/files/96336834509.pdf
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/nirufolivulubivixuwini.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/rawod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7656/files/33612347632.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/73587201415.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_off00005ccd.bin
e6b0873e7f5ede644092c05f2712e568c8849d753caa687840e8bdd8da72befd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCD 5284 bytes
font_01_sfnt_off00006ea9.bin
74740ff1b8600a55af679e0317355c80f3da65f6501f3c6bae8f3a9eb5ead633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 10024 bytes

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