Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e74f3ae666a9933…

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 10:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e924b483af77672fa7a6e3e329853baa SHA-1: fd8d5b15707129b92f50a645394700479880689d SHA-256: 2e74f3ae666a99339515b5d25ec834b56bf850047296bd4f620d443d1d0a63b6
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate study materials, but the primary link redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body contains the lure text and the malicious URL, suggesting the intent is to redirect users to a compromised site.

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=modern+indian+history+pdf+for+upsc+i
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60868594071.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/63605197529.pdf
    • https://cdn.shopify.com/s/files/1/0438/2559/4530/files/93308059463.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/54647689732.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b7dcf7a2be4aa09672ee1cf0f27ae1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/dozikatipufoxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7119/9642/files/ms_paint_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/importancia_de_la_investigacion_en_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/angularjs_6_tutorial_for_beginners_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/eugogo_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/rogete.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a6.bin
0cb3ae35d2cd936fb84fa6fe9fa8491314c0739e5002bd2f5c99176705338ff2
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 5316 bytes
font_01_sfnt_off000074c2.bin
b7c37c15ac0b634433796414e7e428febf6502b2b60e39c8d148105b18d6c1d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10076 bytes
font_02_sfnt_off00009780.bin
4dec04e6c1c32d125cd31980cbff40e74eb89a869a2c11b0113a54907d1835d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9780 6848 bytes