Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b909ddea66b243…

MALICIOUS

PDF

39.0 KB Created: 2020-08-27 16:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ed1f6fa327c37862edf488f9ec01c78 SHA-1: 4970eef8ce644cfbafd3970807e4a533e5bdb840 SHA-256: 94b909ddea66b243977f60efff7790227f432c855ba40ad62b2fec3c57fe29de
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=lesson+1+correcting+sentence+fragmen'. This URL is embedded within the document body, which also contains garbled text and what appears to be a title related to sentence correction. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to benign Shopify domains, but at least two other unknown domains were also found. The primary malicious URL is the most significant IOC.

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.cc/pify?keyword=lesson+1+correcting+sentence+fragmen
    • http://lesogun.7161hydra.com/uploads/1/3/1/4/131409090/mipolivizaba.pdf
    • http://files.garritylpc.net/uploads/1/3/1/8/131872105/e4c4699c20.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/enduring_power_of_attorney_template_nz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/natibatonodokaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/memorandum_for_record_army.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/2006_yamaha_fz6_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/93049844114.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/tepotiwirexovisedux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/geographical_location_of_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/tezuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5964/1496/files/vezovivero.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21800621301.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0051/files/6191629956.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/16572253751.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_off00005bd2.bin
7f9b351d32f9849b26f7ad253ecfccb85383e0d80ed1fad3c64ad7c1e4cb72f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD2 5164 bytes
font_01_sfnt_off00006d52.bin
746254c0315ea65d00cd87b1116bf24910a3c8c5b255ab94b24206a969777442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D52 9796 bytes

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