Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f6c2e37118ced1…

MALICIOUS

PDF

53.7 KB Created: 2020-08-31 17:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8890f1d0353228f501cf8bef2546c4a SHA-1: 4100aff0d66a1d8948efd9c5831147ab3b2d8a5c SHA-256: 81f6c2e37118ced128e770310522f19e34efc306cb70c49302a96e5119fc84fa
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cotton+bed+sheets+made+in+pakistan, which is part of a larger structure of 28 generated SEO PDF links. This indicates a campaign to lure users to potentially malicious content through deceptive links.

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=cotton+bed+sheets+made+in+pakistan
    • https://static.usrfiles.com/ugd/be19e1_d4bdfe9ff82343dd89ddd764052d1121.pdf
    • https://static.usrfiles.com/ugd/1f2646_bf6ffad7d39a443287dd71d84dcd5300.pdf
    • https://static.usrfiles.com/ugd/822ecd_f62b1eeeeb1e45249bf048bf2b6efc44.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d8407c9959e4ee9ae53b1189bb69f36.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0436/1627/2547/files/japanese_chirugali_audio_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gekubamunanapomokavonata.pdf
    • https://static.usrfiles.com/ugd/ed64d2_f7be4c0768dd4a96b02e91e3ebba42d9.pdf
    • https://static.usrfiles.com/ugd/c83fdb_36811f483aec427197df84c814eef39d.pdf
    • https://static.usrfiles.com/ugd/40b9e6_86dc6141a1c140f5bab0200e84a35f12.pdf
    • https://static.usrfiles.com/ugd/b8c837_a58955b17278475283872132fe14e640.pdf
    • https://static.usrfiles.com/ugd/c068f8_58401d48ffda4863a35630b68ec2f23b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1ce2551df0d42a18309366895690d5c.pdf
    • https://static.usrfiles.com/ugd/493135_d2e640a57dfb4ef2a0fb5304ba81b299.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_off000094b2.bin
7a6095d0e033a00860dd305745d4b4653c5882fe07267838951afe7ec85aa92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B2 5180 bytes
font_01_sfnt_off0000a617.bin
7dee9642df33a1fff0a788f4cf1a7291e9a703f6faecbc87552e9bfa9b18c1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA617 10720 bytes

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