Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6f668886d75744…

MALICIOUS

PDF

49.3 KB Created: 2020-07-14 22:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54a367da82b6825b528341a63da73257 SHA-1: 30c1980b8ed10573ce332c8b411bae7e5b577030 SHA-256: cc6f668886d75744b68091cff7f15d35f3f99f484701049bbe1b13db182c0726
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL that appears to be part of an SEO link farm. The embedded URL in the document body, 'https://ttraff.cc/wb?keyword=subtraction%20formula%20in%20excel%20worksheet', is designed to trick users into clicking by mimicking a search result. The PDF also contains a large number of links to other PDFs, likely for SEO manipulation to improve the ranking of malicious content.

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/wb?keyword=subtraction%20formula%20in%20excel%20worksheet
    • http://files.lovingalways.com/uploads/1/3/0/7/130776370/5204311.pdf
    • http://files.purplespirithealing.com/uploads/1/3/1/1/131164260/porijitorodibugiraf.pdf
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.pdf
    • http://files.cvillepack77.org/uploads/1/3/1/0/131070572/9694475.pdf
    • http://files.cynthiawidawski.com/uploads/1/3/1/0/131070861/371a75a038.pdf
    • http://files.trigvintage.com/uploads/1/3/1/4/131409761/giravodowe.pdf
    • http://files.johnbiesecker.com/uploads/1/3/1/6/131606073/6357906.pdf
    • https://zunowud332468685.files.wordpress.com/2020/07/33161405293.pdf
    • https://tijezaj.files.wordpress.com/2020/06/7905998470.pdf
    • https://bazebibirolo.files.wordpress.com/2020/07/89196307079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/19696161235.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/xirulivamenuduvofibajafev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/96696202208.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/jebaxidovipinawame.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/94173546242.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/83341117131.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/85792432140.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajafaliwufenosikem.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/
    • https://zunowud332468685.files.wordpress.com/2020/07/33161405293

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000800f.bin
2183aa1860387786e2340c7788917b3536d629c133dc35a70a775c2d93f3bbd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x800F 5468 bytes
font_01_sfnt_off0000928a.bin
24fe8d4f3e9a6534b0017c67000a7dfecb820e1541f6f45ac4c3ae66786224d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x928A 10840 bytes