Malicious PDF — malware analysis report

Static analysis result for SHA-256 9004364891648d05…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 11:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f9cd428409e5127e205bb0ff3488e9 SHA-1: ce9e83109559787a9ddc7fa844e54e8283703054 SHA-256: 9004364891648d05bd27ade362ab78290d1c7559d4f54b29d3a0abf66ad62b2f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm, designed to obscure malicious activity. One of the primary links directs to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though partially corrupted, contains text suggesting it is a 'printable 2020 august calendar pdf', a common lure for users. The presence of numerous Shopify-hosted PDFs, alongside the malicious redirector, indicates a coordinated effort to distribute malicious content.

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=printable+2020+august+calendar+pdf
    • http://files.kokopelliconnects.com/uploads/1/3/0/9/130969656/xewev.pdf
    • http://piwululos.hawknews.org/uploads/1/3/1/4/131408056/b318fa9ab83601.pdf
    • http://files.youdeservetheword.com/uploads/1/3/0/8/130814531/xediw_tezewazowebewi_feliji_kugino.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/7177110097.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/43408388699.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/makubokumudonufegasanifek.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/wikejibub.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/takotuvupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/wupakar.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/tom_hiddleston_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/24741731366.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/afi_23_201.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/dabizotojodaxiwutunuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/28788212429.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/73982902217.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/lacrosse_craigslist_org.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_off00005e6d.bin
6440933e0b8ea19056bd1dd4525a5844df3727e351fcfd653de7eb5a8b09c46a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6D 5740 bytes
font_01_sfnt_off000071fe.bin
2ad0fcb929ea297407774eb28bfa1958700bdc35e8a2d53905ebf2e11b5e04e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FE 9964 bytes
font_02_sfnt_off0000944a.bin
2906e013a2c12f8438753706de5a20d0a45d34478d649377d82f29cc76ae0543
pdf-font-stream PDF embedded font (sfnt) at offset 0x944A 16108 bytes