Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57e2ad52257bf6b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-02 18:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e0fa81bf6cdf8c3a31724774551ab8f SHA-1: 361d0418ffe020d714456493f05b73e78d9b8723 SHA-256: c57e2ad52257bf6b778032f67f7d21f5857ed39d6f2f83e03285152af727ef9d
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.ru, which is known to host redirectors. The document body contains garbled text but also includes the malicious URL and several Shopify-hosted PDF links, some of which are confirmed benign while others are unknown.

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=runs+per+game+mlb
    • http://files.delmarvagoldens.com/uploads/1/3/0/8/130874612/b839dcbe.pdf
    • http://files.dempseyandwindle.com/uploads/1/3/0/7/130775970/5303147.pdf
    • http://files.bensiddallmusic.co.uk/uploads/1/3/2/6/132681812/3069293.pdf
    • http://files.danaavant.com/uploads/1/3/0/7/130775746/3375008.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/xemezugufekinar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/rawulosor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/11970269022.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/98837119666.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/49889923428.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/jadolixipafakafisigiremag.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/zotesibovazidijujuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/59521244255.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/brew_install_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/system_dynamics_palm_3rd_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/lamuvajerominij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/dapamonopitotamojafoxuran.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_off00006915.bin
57dc65ebdbd6929276d6fa3ab76a8029e15ac8d333f69704aa57b4a699ccbf66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6915 5288 bytes
font_01_sfnt_off00007afd.bin
1f51e2eaffb14938500319daa1e97239b351dd87dbc8ca697b0d3af5bec655e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 10000 bytes

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