Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b8801aa757d64a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-29 20:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b1cf5f804a855b11c219383229337dd SHA-1: 39ae4510e781b96573166fc632d79de4140c1d0e SHA-256: 27b8801aa757d64a7520b889238bb4547fce26f01089cc2fae3deb541d5b19a6
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with 16 identified as part of a link farm. One of these links, 'https://ttraff.ru/wix?keyword=asu+sona+systems', is flagged as a malicious redirector. The document body contains garbled text but also includes the same URL, suggesting it's the primary malicious payload. The presence of a link farm indicates an attempt to manipulate search engine rankings or distribute malicious content through seemingly legitimate channels.

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=asu+sona+systems
    • https://cdn.shopify.com/s/files/1/0441/0467/9576/files/basic_electronics_textbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/layers_of_the_earth_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/25986399570.pdf
    • https://static.usrfiles.com/ugd/b8c837_38c8f7ec8ff14a9e93db357aff1485b5.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_4d975554c201403bb6e907d2c5086138.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad69ca6c5edb4a7694b201c92672dd7f.pdf
    • https://static.usrfiles.com/ugd/87b9a8_4a204b60055c4e8d88fbfd3931ab8e9c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/37309368586.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/63693693448.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/76909823699.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/53993680801.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/pekaxi.pdf
    • https://static.usrfiles.com/ugd/b8c837_42ad7cd5bfc14785bc09d86e4c328895.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d49632ee9294ca1a27a9e31d8779245.pdf
    • https://static.usrfiles.com/ugd/b8c837_95eeb68320074b9591d5225da0a34793.pdf
    • https://static.usrfiles.com/ugd/63d3ad_769257ff8e4946eeaac6ba1ab91c0e33.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_off00007703.bin
10ae14364b37f1f8c6fc207564e799b53af6f86f569f817cf3c690b2c1cad5a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7703 4796 bytes
font_01_sfnt_off00008747.bin
c65048bcf64b83cfb77f42ac541104ccd27f6a15a85d6d3d6d4c0ec5ed9d2687
pdf-font-stream PDF embedded font (sfnt) at offset 0x8747 12004 bytes