Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce222d2f35a722f…

MALICIOUS

PDF

43.0 KB Created: 2020-07-09 23:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f171e23361d7059c139aca7fbfcc1d SHA-1: b5870bcfc7a7417f9baa85d7a019ab13cb527564 SHA-256: 4ce222d2f35a722f678a84d1c8bf7ddeedeeeb6f6b1c331a7f21259044df618b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious content. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, while containing garbled text, also includes the URL 'https://ttraff.cc/wb?keyword=phonics%20worksheets%20for%20older%20students', suggesting a lure related to educational content. 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.cc/wb?keyword=phonics%20worksheets%20for%20older%20students
    • http://files.holdmetightasheville.com/uploads/1/3/0/7/130775371/buxafanum.pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • http://files.sandrapaolalopez.com/uploads/1/3/0/8/130813851/b7389bf85b399a3.pdf
    • http://files.forresterflooring.net/uploads/1/3/0/9/130969907/woxupujetuwije.pdf
    • http://files.folsommusic.com/uploads/1/3/1/3/131378816/5173153.pdf
    • http://files.sitebuilder.middletennesseeflyfishing.com/uploads/1/3/0/7/130738991/vemuju.pdf
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdf
    • http://files.besedin.org/uploads/1/3/2/6/132682561/d857f9aef2.pdf
    • https://nurabekowiv.files.wordpress.com/2020/07/wogagidotelefuzasiperine.pdf
    • https://fivulenis.files.wordpress.com/2020/06/dutozamol.pdf
    • https://vekokipevi722356982.files.wordpress.com/2020/06/xosoxevotajigowowosobi.pdf
    • https://zijolaraf.files.wordpress.com/2020/07/gubelavadibaza.pdf
    • https://febidaj.files.wordpress.com/2020/07/98687096486.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38140624907.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.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_off00006b00.bin
6b081ca77cf32bb462b62d3e0090f2d837ce6decf2c5569160e0ab6ec70bc8a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 4940 bytes
font_01_sfnt_off00007bc9.bin
b55741de408bb59e1a8ec867935fa23c17a1ec8c49e2746950491718eabda458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10328 bytes

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