Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b5e4b7ab22c4bf…

MALICIOUS

PDF

34.2 KB Created: 2020-08-11 02:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284652b53186580a655ac89070e141df SHA-1: fed71506545417616760ecb5e0b0649f070eb700 SHA-256: 62b5e4b7ab22c4bf3a49625d10e816f2cfe650673b9fbf243601532e822f697d
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains references to 'Audi q7 price list pdf' and URLs, suggesting a lure to trick users into clicking malicious links. The presence of numerous external PDF links further indicates a link farm or redirection scheme.

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/pify?keyword=audi+q7+price+list+pdf
    • http://files.cffu.org/uploads/1/3/2/6/132683111/bazakekukaxatiwi.pdf
    • http://files.somosescritores.com/uploads/1/3/1/4/131438899/4d09268a65.pdf
    • http://files.throuthelens.com/uploads/1/3/1/4/131406741/soxaxasa-tilavujesixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/mesiwujeferagibuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/honda_fourtrax_250.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/80028863264.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4008/files/zozewefuxut.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/wniosek_ceidg_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/pexopiwizezoxebetemubezu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/59055271700.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/rebikebamusoxemuxared.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/taxifusojitel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/wesigikakego.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/nijorasarategimap.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/wigirovagav.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/kakugikupoxezi.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_off000048e4.bin
883846067d8308cfa15b95486e4294581fe1a67529852b6f15d0ce7455b3ce04
pdf-font-stream PDF embedded font (sfnt) at offset 0x48E4 5132 bytes
font_01_sfnt_off00005a74.bin
10686e2aa07a10cecb478611040dcc76a3d432255615a996042376b317634b8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 9920 bytes