Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb01ea4723f57da7…

MALICIOUS

PDF

102.1 KB Created: 2020-07-29 21:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf6f3da4bee4040e9e58582cb0b49f2 SHA-1: 40daea657db2a7d7a82d66b76d56c9401ac55e79 SHA-256: cb01ea4723f57da78761191e556ea81e1c7695c0ed27b12b47e7a049caaa1100
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body is heavily obfuscated, preventing a deeper analysis of the lure.

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.ru/pify?keyword=epidemiologia+em+servi%25C3%25A7os+de+sa%25C3%25BAde+pdf
    • http://files.miortuk-alaskan-husky-kennel.com/uploads/1/3/2/6/132682829/xidowipew.pdf
    • http://files.eberharddesign.com/uploads/1/3/0/8/130814397/44f6039.pdf
    • http://files.thesingingsommelier.com/uploads/1/3/1/3/131397946/warilase.pdf
    • http://files.tualatindar.org/uploads/1/3/1/4/131453636/vidonar_sizusuratenaka_goravobefo_puribevunurev.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/mazobomarebonixivup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/4622246675.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/11613556042.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/daxolitoroxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0440/8757/4678/files/judigefizipubowativ.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/81277622636.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/6057294230.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/62615114750.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7173/2889/files/86882032408.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bf6.bin
eb5972aaab6677cc9002368dbfec3534e90dc59b287ab8c581cced50e546a740
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF6 5280 bytes
font_01_sfnt_off00013df5.bin
306c58f2e5cdbebb27f202f03c3d8180283836edb2db9d377703740f84855339
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF5 21140 bytes
font_02_sfnt_off00015eb2.bin
38810129ad223d626905012e82235c7e2e8150ef7c3f51329e312a3ad008b65a
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB2 13576 bytes