Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a87a4d0358146e…

MALICIOUS

PDF

73.8 KB Created: 2020-08-19 09:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14ad6fb43452b2f596fdb578a5d4f550 SHA-1: d31297b27bf3da1a250f128613aa827dc2715718 SHA-256: a0a87a4d0358146eb86a41e2167fe0044ee78b34a62d437b550e1cd4b5b1eab5
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that matches this redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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.ru/pify?keyword=jcp%2526+l+report+outage+phone
    • http://lejomef.fbcrevolution.com/uploads/1/3/1/4/131437987/98e8ae.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1474/files/bijective_combinatorics_loehr.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/24227092600.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/precalculus_mathematics_for_calculus_7th_edition_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/fimeliliti.pdf
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/ring_of_chest_friendship.pdf
    • https://cdn.shopify.com/s/files/1/0435/6364/7131/files/remexogarilivuzawoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/xifisodoviweduke.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/generadores_de_vapor_industriales.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/distrofia_mediana_canaliforme_autoindotta.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/sumokilalumogilefuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2641/5779/files/kudogefagijaforazunasoma.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/19210723450.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/
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/2

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e214.bin
b96f156fdab604d6ad40db203e96ff01b88f90b3a127f89a56ddd1df282a6875
pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 4392 bytes
font_01_sfnt_off0000f10c.bin
6bba0d7ccdfe42359bfe4b33a8592e54a170624a0de9206d7cd02774d5bc06d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 12848 bytes