Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f919229e53e549…

MALICIOUS

PDF

38.6 KB Created: 2020-08-10 11:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67de8141c2a8ce9a0088274d7e7f2dc3 SHA-1: f93ea27837d4fb74c542f8370adb5e10a609b744 SHA-256: a8f919229e53e549dca408c7fcd682e01209e8701eaa700b143a108e49e61955
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=billennium+jg+ballard+pdf'. The document body is heavily obfuscated and appears to be largely junk data, but the presence of numerous links suggests a link farm or redirection attack. 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.com/pify?keyword=billennium+jg+ballard+pdf
    • http://kifozij.wellbalancedfolsom.com/uploads/1/3/1/4/131452903/mebumawo.pdf
    • http://files.trueblueyoga.com.au/uploads/1/3/1/8/131857049/6805340.pdf
    • http://rasaz.cheerequity.org/uploads/1/3/1/3/131384401/siron.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/ludazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/the_un_security_council_in_the_21st_century.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/buvanufofinagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/76738017097.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/35703264203.pdf
    • https://cdn.shopify.com/s/files/1/0428/9993/1295/files/bunavumenuzabimerakemawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/51554343969.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/mawokiboves.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/fodekatotutide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0924/files/academic_year_planner_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/futevasuxigezalulare.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_off00005ba6.bin
eb48c9b522830027dc0a0e7542086139678fbe0c35631222b3f5ba6fff2fcb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA6 5448 bytes
font_01_sfnt_off00006e1c.bin
9bc2b4c1300deec91ac58723567482e9282fe9ea7e501695bb57aef097497f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 9320 bytes

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