Malicious PDF — malware analysis report

Static analysis result for SHA-256 126f8c6a3ee3d6c0…

MALICIOUS

PDF

48.0 KB Created: 2020-08-29 05:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28a6446ca234fc9a9609d9bff9eeb6b8 SHA-1: ae6b9a9aaa05fd91f78b67a2e912e69a6f475cfc SHA-256: 126f8c6a3ee3d6c0606292006016d47d0fbdce607bd7e9f8c304b343f573031e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is characteristic of SEO poisoning or link farm abuse. One of the primary links, 'https://ttraff.cc/wix?keyword=m103+war+thunder', is flagged as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, potentially 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.cc/wix?keyword=m103+war+thunder
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/wonigedudulunikuxabadog.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/tally_accounting_software_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/9856783623.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/54062115723.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/37545159782.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/expediting_report_definition.pdf
    • https://static.usrfiles.com/ugd/b8c837_a13bc0e5fe34492085f4c3059a62117b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a68e02830b39473f841d86b02c2a8941.pdf
    • https://static.usrfiles.com/ugd/b8c837_252bb4464eba48129b44f48d3fa92da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b108469c8e0340d8b80129a5f301a737.pdf
    • https://static.usrfiles.com/ugd/b8c837_d24f5c1e38fc4a3c91b54e5b65764412.pdf
    • https://static.usrfiles.com/ugd/b8c837_220ade6815ed48b7aa4d76abad028ef4.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aef4bd7450e4bf58fb25e2af207edbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4622dc215d2e4f94b6f89ab7e5d0f771.pdf
    • https://static.usrfiles.com/ugd/b8c837_825bd7d1a2074e9fba7e7e164ce6d92f.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_off00007de8.bin
1ca40ea9bda949d5173811e372f2140be2980e8e080dd048c8b0108e63968adf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE8 5160 bytes
font_01_sfnt_off00008f7f.bin
9a56809590a47e26f27dc4b2c874fa03e572e2a1a1ca3208205045eb2364eabe
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7F 10600 bytes