Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25748f9551ddd5f…

MALICIOUS

PDF

35.0 KB Created: 2020-08-19 04:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 754ac95d53774021c026d11ad577116a SHA-1: fc60e47e8dd19baf0c9199c017a2a3157d970943 SHA-256: b25748f9551ddd5f70a09798a0b158974fe3f71ab02109772e90890e31442593
120 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 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with numerous embedded links to external PDFs hosted on shopify.com and other domains. The document body, though heavily obfuscated, contains the same redirector URL and a list of other PDF links, suggesting a coordinated effort to distribute content through a link farm, potentially for SEO manipulation or to host further malicious payloads. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=breezer+vivid+shuffle+full+song
    • http://files.hobanwellness.org/uploads/1/3/1/4/131406275/sirero.pdf
    • https://cdn.shopify.com/s/files/1/0437/4750/8376/files/65562151579.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/37393842485.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/botanica_plantas_medicinales.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/vodilugotetawuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/38654878522.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/mazinovaterekibabebaji.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/vekoned.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/82703705323.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/73691388513.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c3b.bin
50a27d94c563329634773ce7bd99999325be76472266d34b5c739a9129766a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3B 5116 bytes
font_01_sfnt_off00005db6.bin
5a44e5af89f1f5f9e3ce67b06cafe26a3bbf110b2b3bcb9e5873385e6ed404b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB6 13340 bytes

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