Malicious PDF — malware analysis report

Static analysis result for SHA-256 af23b550a4f25c43…

MALICIOUS

PDF

37.1 KB Created: 2020-08-30 17:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bb63c19c5fa5d22c1708e9ed97607a SHA-1: 4888b1c8eaf8239c11e6f66d1dd2205cfc0fc112 SHA-256: af23b550a4f25c4351c9458eedb49970a053e5b4f8dc264733ca5b1bd411dd87
128 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a 'Cat 3406e service manual', suggesting a lure to entice users to click the malicious link. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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.ru/wix?keyword=cat+3406e+service+manual
    • https://cdn.shopify.com/s/files/1/0440/0565/4686/files/gezufukovoxilumiligowun.pdf
    • https://cdn.shopify.com/s/files/1/0431/9841/5010/files/ratekepivelidazorugazaxen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc17a7272924eab8106535be1aeb6b5.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_d68153ef9ee14aaa91cc453f6a18bded.pdf
    • https://static.usrfiles.com/ugd/d94ae5_5146b93df0af402a9987d391d66baeeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d041ea95fc0438da95402990f57da6f.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/fusionner_pages.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/jexudedoleg.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/python_button_combo.pdf
    • https://static.usrfiles.com/ugd/696117_2c7cff3acea145b6923614fb05294598.pdf
    • https://static.usrfiles.com/ugd/b8c837_53a43d0c34034f5382a7e75c5f1d4d4d.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_off00004f9b.bin
470edeee6b1e33adca40db0d81a744bbb7105c86c116323c8512904c4fecb861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9B 5460 bytes
font_01_sfnt_off00006212.bin
11b755619e4551ee6310395d5ef7549ea246c5d8ea153ac7a8d496ece202cbd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 11144 bytes

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