Malicious PDF — malware analysis report

Static analysis result for SHA-256 980caf424f365c86…

MALICIOUS

PDF

33.3 KB Created: 2020-09-05 06:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d6f3cfdb4f0310a289c2f3fef33689e SHA-1: a05a2e187df279f317b9fd5dc1bd32dcf52d39dc SHA-256: 980caf424f365c861b48c1087e285b2b1aecd4acdb54f2a39feed6721c400fcc
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 'https://ttraff.link/pify?keyword=sakhi+movie+songs+ringtone'. This URL, combined with the PDF structure and embedded links to various PDF files, suggests a lure to a malicious site. The document body, though heavily obfuscated, contains the same redirector URL and other Shopify URLs, reinforcing the redirection attempt. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=sakhi+movie+songs+ringtone
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/killer_been_unleashed.pdf
    • https://cdn.shopify.com/s/files/1/0463/3205/1618/files/28155775564.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/activismo_politico.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/clothier_guide_voodoo_doll.pdf
    • https://static.usrfiles.com/ugd/c345b0_44a9722c84bf455aac4628639306edc7.pdf
    • https://static.usrfiles.com/ugd/6df952_8879eecaf5e24cf998c0f4285824e28b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c83d6f5ee0a4f86b957aad8ec816b6c.pdf
    • https://static.usrfiles.com/ugd/b28ae2_4f0877db902c42a283bc4755034e3709.pdf
    • https://static.usrfiles.com/ugd/948cea_083358e5fed141a79f4c09c47f4dfcf4.pdf
    • https://static.usrfiles.com/ugd/8b2c09_141bfacaee9949d297f0113305c7e408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/ccna_exam_dumps_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/onclicklistener_android_kotlin.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_off00004779.bin
9cb9f6372a0b412cb494bac46b23a201a0117ea2cf54c580c7047574c14d805a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4779 5296 bytes
font_01_sfnt_off00005957.bin
32830fce256abd8330cdd4c9d63a58fbd0753917bf76b6fb01ee02fc78c48f56
pdf-font-stream PDF embedded font (sfnt) at offset 0x5957 9176 bytes