Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ac61f8a7b8ede5…

MALICIOUS

PDF

53.3 KB Created: 2020-09-02 00:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e40d1c9da9c8567d82dc4e8a08df04 SHA-1: 024fafd3e9c9de78db92eec21de824f27b6d26fa SHA-256: 67ac61f8a7b8ede5aa50a9816e96bbefd9e18a891d9058cc4e1936bbc3731786
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to quiz answers and includes the malicious URL. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.com/wix?keyword=picture+logo+quiz+answers+level+35
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/80c1db_6e82876ca5cf4e5fb56387e58493e5d0.pdf
    • https://static.usrfiles.com/ugd/c618e9_85df16cffd384e229c321d0cd89e82f5.pdf
    • https://static.usrfiles.com/ugd/599f1c_06112df4c19b4c81b7cc3334276c79ab.pdf
    • https://static.usrfiles.com/ugd/934fc3_85b489e4aebb4c5c93b9a2f13e013adc.pdf
    • https://static.usrfiles.com/ugd/9cb927_d5c237252f5d4c6dbb85014805d16b1f.pdf
    • https://static.usrfiles.com/ugd/a91264_f9c7844d49424142b002754a09a0adba.pdf
    • https://static.usrfiles.com/ugd/d79848_02eecbb5328e411dadae6b40d75244fa.pdf
    • https://static.usrfiles.com/ugd/253000_bb70fdd61311422abd2c42b2f4d780df.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/83821999529.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/toxinalipes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/exhibition_planning_and_design.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/palladium_robotech_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0428/3950/7100/files/5789677701.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009282.bin
ad734f5de187b461e9cb7c7dab9e3d7541d80eac615b600e9312f0a97539585d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9282 5584 bytes
font_01_sfnt_off0000a5b7.bin
ef1fd8f238b9129ee77f25499ff5b1d506d1eeec5af8527baef949572be1fa32
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B7 10252 bytes