Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dd8bd6a7983e3c…

MALICIOUS

PDF

38.8 KB Created: 2020-08-03 03:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aac6d3cec5c31d1e95479f72d69a4c4 SHA-1: 17a44a946208c0b5ac84a6f135a2c0e6327a4f03 SHA-256: 52dd8bd6a7983e3cc017cd80f6307ab6d4bd0b28bf4b3d3bd81523892c6e22a1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=rca+voyager+manual', suggesting a lure to disguise malicious activity as a manual lookup. The ML classifier also 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=rca+voyager+manual
    • http://files.advanceprolighting.com/uploads/1/3/1/4/131414134/a91b69fd3900.pdf
    • http://files.juniortravelers.com/uploads/1/3/1/8/131856339/fuxubuf.pdf
    • http://files.mrsteadman.com/uploads/1/3/2/7/132741535/pikosusuro_ruzovuserepafa.pdf
    • http://files.personalwellnessjourney.com/uploads/1/3/1/3/131379406/jejixosuzufop.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/34934294744.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/dumidolozaboti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/bijidulijatotudavegaden.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/ledalufab.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/dufekeje.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/93459568334.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/67551248769.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/megutasubexijuwujasad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/e6_98_a5_e8_8a_82.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/gesibeju.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/dikebenabivekefor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2828/files/91356635152.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_off00005a8c.bin
7dd7adee19398eb774c9ef31ea0e075d378af280270f1065b45bdcab6cee4c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8C 5112 bytes
font_01_sfnt_off00006bf1.bin
3c8dfdde7b1304e610ecca87b7aef494699c80479eac3735ed4372a3d9b123a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 10184 bytes

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