Malicious PDF — malware analysis report

Static analysis result for SHA-256 5821e88b9c5b0eee…

MALICIOUS

PDF

42.3 KB Created: 2020-08-28 11:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3a9a46722e1ee67d1b6868d1f04306b SHA-1: 5fc2d5c718cf2bab84d7c1018c8c829cdf7c3d66 SHA-256: 5821e88b9c5b0eeeccbf8242504e58ca194e6828c88548d60b4f1d75b56ddae7
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a keyword related to '1950 dodge truck parts'. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive link within the document.

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=1950+dodge+truck+parts
    • http://fipobaxew.wyldrootsmercantile.com/uploads/1/3/2/3/132303189/danipin.pdf
    • http://files.firstunitedpc.org/uploads/1/3/1/6/131607095/a60f6bb711b3109.pdf
    • http://files.soundsystemnetwork.com/uploads/1/3/1/8/131856195/fepizatuwup.pdf
    • http://files.instar-program.org/uploads/1/3/1/4/131438823/lagagijowufuze.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/35520979882.pdf
    • https://cdn.shopify.com/s/files/1/0430/3739/3049/files/bienvenue_a_paris_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/43908907472.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/78740519918.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/fopevepovilanesujorexasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/numezeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/ionic_3_free_templates_github.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/forup.pdf
    • https://cdn.shopify.com/s/files/1/0458/2752/2723/files/rinoskopi_anterior_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0437/8515/8813/files/jowororaladefuruxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/58747434534.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/soxejibi.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_off00006647.bin
505a5e2759e353970abe8b65a202dc1aaba7416f41def48714fcdafa683836a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 5652 bytes
font_01_sfnt_off00007994.bin
4dd09e29e99c7647fb2986dd334752f4ff7d5453d5e147ff5f3bcb529cfd3fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7994 10092 bytes

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