Malicious PDF — malware analysis report

Static analysis result for SHA-256 c499091461e4a37b…

MALICIOUS

PDF

34.2 KB Created: 2020-08-11 08:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f125444cdd4d79b98b20520eedca594 SHA-1: c2d5edfb23b79c1df2c5667785d8eaee98987415 SHA-256: c499091461e4a37bd8d1d83d42d4cc6fe943a09960c5025614041fc9727472d9
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 infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the malicious URL. This suggests the PDF is designed to trick users into visiting the malicious redirector, likely as a step in a phishing or malware distribution chain.

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=sidereus+nuncius+albert+van+helden+pdf
    • http://files.hornbyrugby.co.nz/uploads/1/3/0/8/130874281/7b8392769e3.pdf
    • http://files.completewellnesscenter.net/uploads/1/3/1/8/131871745/cae1df.pdf
    • http://files.codyrooney.com/uploads/1/3/1/8/131856072/1955201d29bb.pdf
    • http://banesu.cliocareer.nl/uploads/1/3/0/7/130739206/karijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/kramer_clinical_epidemiology_and_biostatistics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/tinkers_construct_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/65963196638.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/jepexexevevepegabiwabam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/pepunapek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8167/files/zudowoxemit.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/90361984341.pdf
    • https://cdn.shopify.com/s/files/1/0438/3273/7942/files/jawahar_navodaya_admission_form.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_off00004512.bin
0e3adbbcc763273aa4f9c3cb3b709e4a4e602e6a108846044e6abe638e3095ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4512 5544 bytes
font_01_sfnt_off000057d9.bin
68e08bd58f14c3d6f00a3a2060ef0b348fb6510636f3bf6dc9ddebe107a70805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D9 10496 bytes

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