Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41cf3f5590fef3e…

MALICIOUS

PDF

31.6 KB Created: 2020-08-21 20:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96310b4fb289f4412be563c743ad265d SHA-1: 92e2a471fca24c08d4174faf45ed71ae1f2a454c SHA-256: b41cf3f5590fef3e37026026ab39f1b0509d8d7b3108f569dbb753236eb2bfcb
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, specifically pointing to 'https://ttraff.ru/pify?keyword=houma+weather+report'. The document body, though heavily obfuscated, contains this URL and appears to be a lure for weather information. The file also contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files, suggesting a link farm or SEO poisoning tactic. No scripts were extracted from this sample.

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=houma+weather+report
    • http://kipuka.megacandyimporters.com/uploads/1/3/2/3/132303195/8fd71824630.pdf
    • http://mumog.alkanz.us/uploads/1/3/0/7/130776811/6085647.pdf
    • http://files.concordiaball.at/uploads/1/3/2/7/132741535/lapevegowawidaz_supetarixamatel_sijizeratodijan_nobibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/lotosimiwunenigolumem.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/90418038889.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/unholy_death_knight_talents.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/werofudagiwaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/lowes_lawton_oklahoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50833930904.pdf
    • https://cdn.shopify.com/s/files/1/0464/4788/6504/files/blank_t_shirt_template_vector.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/rarexa.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_off00004202.bin
02fc234787652db82aedecbf885fd5370bbb355c07d951f29ad2c8d806198610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4202 4904 bytes
font_01_sfnt_off0000529a.bin
5aa6e09ff3d0402ee2556d62a8ab28cbac9cfec71944e69d7494eff8b7ccf323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529A 9332 bytes

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