Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2389a8897f5c7a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 23:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72afe3a53a28d43c9f3e297d4a24c895 SHA-1: 5d33b4d013900d44a7af95c11a8cd8a120023b25 SHA-256: bd2389a8897f5c7ac0072b2bad6c6fa98f0f6ec3f248fff1373a7a94210917c5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=brussels+metro+map+pdf+2020'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0431/6626/9597/files/sososotekavevivapovavuve.pdf' being the first identified. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector is the malicious redirection embedded within the PDF.

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=brussels+metro+map+pdf+2020
    • http://files.highaspirationsapparel.com/uploads/1/3/1/6/131607522/2799114.pdf
    • http://files.barbsbelizeandbeyond.com/uploads/1/3/1/4/131483143/24ea01ba.pdf
    • http://munisuta.bartek.systems/uploads/1/3/1/4/131454065/lafuvukigis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/sososotekavevivapovavuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/zipomemoneva.pdf
    • https://cdn.shopify.com/s/files/1/0447/9719/8487/files/biology_sample_paper_class_12_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/obs_twitch_chat.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/systme_bielle_manivelle_exercice_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/gadak.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/vubisowaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4683/7151/files/quran_afaan_oromoo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/tunaxawip.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0051/files/pufuxepiwiwuwofukasujuz.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_off00007160.bin
ae3808c09bbdb9b9adea375fd8272f3ce424a0911eb3164e70e40a4dedb54d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 5512 bytes
font_01_sfnt_off00008404.bin
054e9800fbcf00b2cee39937b87a98a15afb67e8c5a7cee9ea5403ff03d95beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8404 10192 bytes

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