Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0c0d7b89eec945…

MALICIOUS

PDF

40.4 KB Created: 2020-09-03 05:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b320da2aa2d88c53c2fb3ea3dcd6c96 SHA-1: 13d285c5f26d77e630e0a3ed66ed5c3cef5873ad SHA-256: de0c0d7b89eec945af3a4e773c0a4444a40ae5114efdf665da3c1eec8d7d5f1a
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be luring the user to click on the malicious redirector URL, which is likely part of a phishing or malware distribution scheme.

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.cc/wix?keyword=low+cholesterol+diet+sheet
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/bofidunusoworewisevit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/telecharger_agario_private_server_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3839/9902/files/fakugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/30476709999.pdf
    • https://static.usrfiles.com/ugd/b98abb_5d1b635591984351be05796b1feba981.pdf
    • https://static.usrfiles.com/ugd/c7a620_f9ba0a4b35f94f66b2d16f41e6b43538.pdf
    • https://static.usrfiles.com/ugd/868401_719838043f154d5c8a7505b9acdaa6ef.pdf
    • https://static.usrfiles.com/ugd/bdc04d_760cf4f674814b6f805324b3f033e928.pdf
    • https://static.usrfiles.com/ugd/3be3a7_60ca3911b98f4089aacf43a2dbb54d66.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/signs_of_bed_bugs_on_your_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/foodsaver_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/galilesezegitakaro.pdf
    • https://static.usrfiles.com/ugd/3dd68e_9f7aef90914e4f0a82e87bf7c50fd0c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d24299663f74cb9828fc4d8b1de3ae4.pdf
    • https://static.usrfiles.com/ugd/3649d2_322b89eb2b9f401992f0e99ab4e7c404.pdf
    • https://static.usrfiles.com/ugd/c34eac_5a650e93af5d40d7bced71e67ea71386.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_off000062f7.bin
622501e37792e4d2b106545cfc04dfa12822342dc08f3e5c0c3578f3232f2332
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 4848 bytes
font_01_sfnt_off00007380.bin
a8586c114daf310558f03c30a12192af54901bba6a57a10c1fb2096d63f8bab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 9752 bytes