Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42c2c1f930c7f2c…

MALICIOUS

PDF

38.4 KB Created: 2020-08-27 13:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 946caa76590c0c37e24d62d5de95f1c5 SHA-1: 8d093ead65f509d49f4529571871a22cd1604254 SHA-256: f42c2c1f930c7f2ceaaf03f8490d3d1f290aed2a7e6dc56e48581138b3fbb0e7
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, many pointing to PDF files hosted on Shopify. One of these links, ttraff.com, is flagged as a known malicious redirector. The document body contains obfuscated text and the phrase 'For the sake of brevity', which appears to be a lure. The primary attack pattern involves redirecting users to potentially malicious content through a link farm.

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=for+the+sake+of+brevity
    • http://files.dassiedahan-author.com/uploads/1/3/1/4/131436971/wixodasa.pdf
    • http://files.officeformations.com/uploads/1/3/1/6/131606923/xepovexivudafeluvi.pdf
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/82286246405.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/82481031561.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/46835505092.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/zemuzewulokajulakozelovuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7327/2998/files/palayathu_amman_film_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/tewuruvoxoripisano.pdf
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/68763956773.pdf
    • https://cdn.shopify.com/s/files/1/0444/5736/1575/files/bansal_classes_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/s3_bucket_policy_example.pdf
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/21852383270.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/real_estate_data_api.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_off00005975.bin
608334819558b734f225f3db844e3567253bcd91b136654361fad4a29a589b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5975 5144 bytes
font_01_sfnt_off00006b05.bin
0b1323ca2d63cb6412d25ee47605b8b86b49927f4c807f28b09e83fcca53a081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B05 9952 bytes

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