Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4657d4e450b93e…

MALICIOUS

PDF

52.3 KB Created: 2020-08-13 23:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba0c575503ec26f4724605e58b32c7cc SHA-1: cbefd7e2a0b621b0339250b9f1986de959d99c41 SHA-256: cb4657d4e450b93e9bf932fdee9f6ad18aaa0f53e8ba5bc0ee023740379a824a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=logitech%20harmony%20hub%20remote%20manual'. Another critical heuristic indicates this PDF is part of a link farm, likely for SEO manipulation to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL.

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/wb?keyword=logitech%20harmony%20hub%20remote%20manual
    • http://files.beconfidentstudio.com/uploads/1/3/0/7/130739498/9216091.pdf
    • http://files.devonportcomhouse.com/uploads/1/3/1/4/131408100/df88d833b625.pdf
    • http://files.stmarksnspfoundation.com/uploads/1/3/1/1/131163945/5082a2704d9f9.pdf
    • http://files.allotmentphotogallery.com/uploads/1/3/1/3/131384635/bubimobalojo.pdf
    • http://files.gaprx340b.com/uploads/1/3/1/4/131454771/6998361.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/16667596488.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/html_code_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/81556978758.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/k_nearest_neighbor_algorithm_in_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/bill_of_attainder_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/motixilivavikixarufivexig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/zebirotonijuwefiguzil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/zidijatorumozonodumata.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/7542864803.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_off000081fa.bin
2fc92361b53855145c6eb8b47e97f3011524afd115356c91886a224497676e43
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 5100 bytes
font_01_sfnt_off00009339.bin
e390d566d11c6dabc6c2b3b3a38003380a7d6fecbc9d51d99b02d8d6136581e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9339 10068 bytes
font_02_sfnt_off0000b5aa.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AA 4324 bytes