Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bea3d5d8546ce8…

MALICIOUS

PDF

42.8 KB Created: 2020-09-11 21:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f87a1f82d2545d9055087873afa32953 SHA-1: aa35355e0e82472cf5c0021486620a3a8c12a383 SHA-256: 26bea3d5d8546ce827d164e836f3edef67d83daed544414c9cf7e20fb7dc9bbb
152 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 a redirector service. The primary malicious URL identified is https://ttraff.club/wix?keyword=chrome+ig+story+by+alec+garcia, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=chrome+ig+story+by+alec+garcia
    • http://files.foreverandadayproduction.com/uploads/1/3/0/7/130739996/2782350.pdf
    • http://bikudi.wipinc.net/uploads/1/3/1/3/131383790/f8caf.pdf
    • http://keweduv.lindenhillspottery.com/uploads/1/3/1/4/131437462/8045141.pdf
    • http://files.ethymedia.com/uploads/1/3/1/4/131406321/sefadotax-xavivometere.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_661db72c62824f278ff4690e0b1c0fdd.pdf
    • https://static.usrfiles.com/ugd/2072cd_cf3d7a2be6a54d3493e0586a5eb85d26.pdf
    • https://static.usrfiles.com/ugd/12daa7_76bed98d64fa469daecd733f2e2b7cf7.pdf
    • https://static.usrfiles.com/ugd/1d3654_e8e67c6a81034f2492e52b235eadf789.pdf
    • https://static.usrfiles.com/ugd/f0e51d_a310f5a788594cd58dd18ed98f75dba9.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/dejalasadasapemelod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/93733135221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/lenadalok.pdf
    • https://static.usrfiles.com/ugd/d2057d_7ae12aa61f06429e91702f71faf16be5.pdf
    • https://static.usrfiles.com/ugd/dbbfd0_d4f9dd55762d4566baec1369bd24c35a.pdf
    • https://static.usrfiles.com/ugd/bc4951_137a99d051644269b2c47235634b21d9.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_off0000688a.bin
269730cb08ae16f39ee15356cd3a623b9d29a28436d91d67bcb08af010a9505c
pdf-font-stream PDF embedded font (sfnt) at offset 0x688A 5360 bytes
font_01_sfnt_off00007a9f.bin
46ee9ae09c4df1aaf76b25535a98334e942e7408323f5161327806111c8cbd8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 10504 bytes