Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c73b5e1ffe40d3e…

MALICIOUS

PDF

38.2 KB Created: 2020-08-17 11:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db5556714423dec8b07a773aa1fe6d5 SHA-1: 2ccf04ad370dbeb7a86a5e965c03368537f4bde3 SHA-256: 7c73b5e1ffe40d3e716435e5343eeb7dac81f648d907a622bc46c8e91a07e679
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=full+form+of+mla+handbook'. The document body, though heavily obfuscated, contains text related to 'Full form of mla handbook', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for 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.cc/pify?keyword=full+form+of+mla+handbook
    • http://kelega.mildlyadventurous.com/uploads/1/3/0/9/130969634/212b1c8303d.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/fisiocratas_y_mercantilistas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/78436439843.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/brian_kopps_1_60_alliance_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/62692846901.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/95051717186.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/30728706380.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/verajuvudosoxozajarotupod.pdf
    • https://cdn.shopify.com/s/files/1/0436/8393/8457/files/cch_convert_file_nh_sang.pdf
    • https://cdn.shopify.com/s/files/1/0432/9082/0774/files/penatalaksanaan_hernia_inguinalis.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_off000058b8.bin
fb3e5f51176ac1e379856dce323242315e7ae61734ddb0955212c7c54e467387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B8 5128 bytes
font_01_sfnt_off00006a02.bin
b7b5521269748c4d7436785c10f3ac752b0f18d34ef755d30469a825233c4a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 10104 bytes

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