Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a879c640c468185…

MALICIOUS

PDF

40.8 KB Created: 2020-08-08 01:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0892e415b9a4aec5747e9db2fcc3e3c6 SHA-1: 6cf1c6d3628624292fc635f999dc8ef62321c594 SHA-256: 4a879c640c46818526a9659c1c2265aaae51ea6126cf494f460de355c1e346ea
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ceiling+fan+price+list+pdf'. This URL is embedded within the document body, disguised as a price list. The document 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 is likely used to deliver a secondary payload.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ceiling+fan+price+list+pdf
    • http://files.nathanganser.com/uploads/1/3/1/3/131379049/7dc72ba5031c6a.pdf
    • http://gawowu.nushagakfurcompany.com/uploads/1/3/1/0/131070786/4427135.pdf
    • http://files.en.les2lacs.com/uploads/1/3/1/4/131453982/ac2fe22.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/76838977042.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/tiwokefaxaxutogapikokupop.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/wordpress_get_page_title.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/kavisikofowepuxax.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/lajop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/fobonogofajewux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/ccnp_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/wojeziratejuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/verizon_fios_channel_lineup_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sabam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/22783176952.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/80689968047.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_off000061d7.bin
a0534cf9f6f51cba85f96a6e54e55824456ca484ebf9a8e61134a164c33ffd08
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D7 5228 bytes
font_01_sfnt_off000073b3.bin
5bc93285fdf75b7ccd36bc3e91ea0ba732920a1d901fae84ee72404b80dbb2d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 10124 bytes