Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddb224206286df5…

MALICIOUS

PDF

43.4 KB Created: 2020-09-02 13:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cc7997cb48345a4374a56ffb7694217 SHA-1: 6c07cbbebf7e49edd71791ab9c8e709ddf61449c SHA-256: 1ddb224206286df5f19b1e81af7b910095ce05fc992381b27df275b4d64373ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic indicates a malicious redirector link to 'ttraff.me', suggesting a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains the same suspicious URL. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=cdc+hand+hygiene+guidelines+2019
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/5787888718.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/rocket_league_trading_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/mechanical_pe_exam.pdf
    • https://static.usrfiles.com/ugd/3cb679_72ed058633924383b81000c735bbd60e.pdf
    • https://cdn.shopify.com/s/files/1/0452/4307/2674/files/aqw_legion_revenant_class_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdf
    • https://cdn.shopify.com/s/files/1/0438/6743/9259/files/momotaro_story.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/ost_paradise_kiss_hello.pdf
    • https://static.usrfiles.com/ugd/bf650e_7e5bdbd42fb34b048819b819d579a93d.pdf
    • https://static.usrfiles.com/ugd/9ec29b_2d976c0467664ae98592f862941efad6.pdf
    • https://static.usrfiles.com/ugd/3d7af5_36e989ffc24d4133957c718680292daf.pdf
    • https://static.usrfiles.com/ugd/b8c837_06a290a14c7b4918819c938994945933.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://static.usrfiles.com/ugd/3d7af5_36e989ffc24d4133957c

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4c.bin
79a0db696434d81abfcc2525a3d309f904ff172583fdbd6f51001011124780f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4C 5592 bytes
font_01_sfnt_off00007e52.bin
bd40fa73e8de84d6f92d5f1131107440a5aa5ba353d4e671885db0af9f89784f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E52 10028 bytes