Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28397841191f162…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 01:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53be8dfc483951e8e497e3a883c378d6 SHA-1: 201297262f6e7129c8d52b97d5ad6d0f0be3521b SHA-256: f28397841191f162c255e3558786e4d1e68f74517bafa27ce71455153dcd2ba8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=nfl+weight+training+program+pdf'. This URL is embedded within the document body, disguised as a link to a weight training program PDF. The file also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL, which likely leads to further 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=nfl+weight+training+program+pdf
    • http://files.ashleynelsonnd.com/uploads/1/3/1/4/131454620/fifuxut.pdf
    • http://files.candcstoneworks.com/uploads/1/3/1/3/131379312/03fe1c35.pdf
    • http://files.theaaazone.com/uploads/1/3/2/8/132813998/dekatifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/53984206631.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2739/files/webisigoxakosenag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/demite.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/ninusajasojegoxabosiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/lokegajuxidonanibupiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/nokupivilegawuzu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/ffxiv_act_install.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/47192575587.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/pixiketemub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4331/5102/files/fopopis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/bissell_proheat_troubleshoot_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7005/files/6109337700.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_off00006135.bin
d16ca0193b044112aca0bfa27c2a7d552804398b49faa1369d4b2612e165dee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 5340 bytes
font_01_sfnt_off0000734b.bin
51a4785210450ed2374dca9bbef7c7355de691f9b8db66759e5ee31681a77b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 10208 bytes

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