Malicious PDF — malware analysis report

Static analysis result for SHA-256 f917ded4281df00a…

MALICIOUS

PDF

44.8 KB Created: 2020-07-28 22:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b96bcac48c9590f2f41db0a4110684b1 SHA-1: 7e7349f1e4e54c978bcacb2bf12f2228d2e65bb1 SHA-256: f917ded4281df00a5a64f58930a71278a898e3e3951b2e86f2ea7b95434f2a59
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference 'Bonnes pratiques de fabrication 2018 pdf', suggesting a lure to disguise the malicious links. The presence of a link farm heuristic further supports the attack pattern of directing users to external, potentially harmful, websites.

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/pify?keyword=bonnes+pratiques+de+fabrication+2018+pdf
    • http://files.silverlakebarroncounty.com/uploads/1/3/2/6/132695543/fubavixiruw.pdf
    • http://files.chapelbythelake.net/uploads/1/3/2/6/132695493/feliju.pdf
    • http://files.bernardcassiere.fi/uploads/1/3/0/9/130969607/pipoluwi-togobafolixex-xesuwa-fadul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/76026280028.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/sopexefivufojusodeler.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/58238771567.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8072/files/76133877033.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/41123599570.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/30032073778.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/waligolimaxawegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0747/4844/files/70159995709.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ralaguguzovepusumizus.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b24.bin
2c85158922822a45ef6d0661f7be44698a4571e14afcac55118d677a24f26c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 5836 bytes
font_01_sfnt_off00007efe.bin
9ff398a243fd43b60e4694240372ec4522c4f101ba396dc9601056b7ae5c5e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFE 11900 bytes

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