Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dbee3312cda701…

MALICIOUS

PDF

44.2 KB Created: 2020-09-02 05:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc47cf08a890cfd4bcf6ce3fec703354 SHA-1: 64817bbe1662e3d23ecc4728e7832244c8af40f2 SHA-256: 94dbee3312cda701ef386dc8f47cd409fa56897404e79fe56284a454e1415405
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=formation+pour+chauffeur+de+bus+ratp'. This URL is embedded within the document body, suggesting a social engineering lure related to job training. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely intended to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=formation+pour+chauffeur+de+bus+ratp
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/64282625520.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/libuzodevuzenafuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/33132410848.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/44711934664.pdf
    • https://cdn.shopify.com/s/files/1/0461/9026/4469/files/business_gift_certificate_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0465/2040/2078/files/ultrasonic_level_transmitter_calibration_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/givafefotugad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/zaremibanaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/zafozevexo.pdf
    • https://cdn.shopify.com/s/files/1/0448/9897/5899/files/skf_spherical_plain_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/73616315543.pdf
    • https://static.usrfiles.com/ugd/d5415a_837e1bc81e6d4640a3f4a8cfb0eab813.pdf
    • https://static.usrfiles.com/ugd/94e5ef_fb4f9ca703314d3bb94c0c7d143b1d8e.pdf
    • https://static.usrfiles.com/ugd/3f80ec_ff70483892c8431bae8dfc9a62e3c9dd.pdf
    • https://static.usrfiles.com/ugd/6846fe_12f05b25394f45378e1c9080b7640ce1.pdf
    • https://static.usrfiles.com/ugd/cece23_22a840e9c5984217b9c3f2c6ac188b5d.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_off000068c7.bin
0fc30b6edaa3eb1e0c707fb9eb4a1c1d44c0a6e9df5f7fb2d80b39bed4aeba2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 5460 bytes
font_01_sfnt_off00007b26.bin
66a7c77e1d1a3a20420ec6508d32480c7912ce1219425176cb96a2ed5edbfa4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 12376 bytes

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