Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b504f56d2d7c84c…

MALICIOUS

PDF

51.8 KB Created: 2020-08-28 13:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d8095062fc09fbea44ee9f05297f8ac SHA-1: 8430a9ec731217f126cfb413f3d4d4238d64b74b SHA-256: 0b504f56d2d7c84c97a6de279b87b58dc4f743df5ff4837ba7f4dca9bb001041
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'Digimon world dusk cheats codes' to entice users to click the malicious link. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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/pify?keyword=digimon+world+dusk+cheats+codes
    • http://files.thetamcgill.com/uploads/1/3/1/8/131856672/fb3f49a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/file_ko_cho_in.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/novena_de_navidad_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/zububoruwarebavej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2978/files/atomic_theory.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/xomajopatanigodov.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/sopotifapogusukisimibewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/digosedesoben.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2823/files/sql_server_configuration_manager_missing_reporting_services.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/onedrive_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/88498544146.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/28289576034.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_off00007f94.bin
e3444849e285d49d6db00731b0905aaf8d0787a3dae2b27316950ec2293c3297
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F94 5508 bytes
font_01_sfnt_off00009230.bin
edb58a3d6f375b1a4fad1f8657da87c183b36ecf02e1297021d6c13ca034158c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9230 15524 bytes