Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15a10f6276af665…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 08:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed1e2a18cb77fdf99a97055b4606228 SHA-1: 68bcb73630529599c892447859d2f4397c13c16f SHA-256: f15a10f6276af665c45c6fd7ff4b9d2f61ddcfa6d897ed5ac94288b4cf88a74e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=5th+grade+math+decimals+worksheets+pdf'. This URL is embedded within the document body, disguised as a link to educational worksheets. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is likely used to redirect the user to a further stage of the attack.

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/wix?keyword=5th+grade+math+decimals+worksheets+pdf
    • https://cdn.shopify.com/s/files/1/0437/2362/0503/files/xejuderowadixunolinurawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/31917654293.pdf
    • https://cdn.shopify.com/s/files/1/0449/1522/8839/files/alimentacion_en_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/80258263857.pdf
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/84623997044.pdf
    • https://static.usrfiles.com/ugd/930050_502686f7bf22498890fae06b6d5cf990.pdf
    • https://static.usrfiles.com/ugd/b8c837_43733c1196504b1db6c4a34a0a534cd8.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_b2ece3ee58c54eb2a19cb9a51c080653.pdf
    • https://static.usrfiles.com/ugd/93971e_5a93ee7396c54cdeb904b1c22131215d.pdf
    • https://static.usrfiles.com/ugd/a382ee_e77097b7991548b1b46a8cb5677cb815.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/48865365183.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/animals_video_song_maroon_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/63198604789.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_off00005fc3.bin
aa48c90cd714f9690a2acd42854257248505114ee873236a7b16c1163cbca26c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 5752 bytes
font_01_sfnt_off00007355.bin
02a6f2cc55385f9a7c42d81c7fdb4704b6ea4f544675a54c52ba5b9c31435c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7355 10176 bytes

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