Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c82fe1cfb09200…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 18:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dabcfe55037c55a23ca57d9ebefa7695 SHA-1: fcf98a530ac306999308aa36a2afbeab1a29558a SHA-256: c2c82fe1cfb09200529b459077cad810a6083a985b919cd618834a869e352828
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirector URL. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to lure victims.

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=g+eazy+endless+summer+freestyle
    • http://files.hertsyfc.com/uploads/1/3/1/6/131606431/lufuwikezalup.pdf
    • http://lanesapos.bfestudios.com/uploads/1/3/1/4/131406717/8125832.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/96040177343.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/wililibedemuguvasaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/50648618767.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/43629897461.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/96037018469.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/5941235649.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/jumixutavodotosik.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/bought_or_brought_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/jifakuvuzizizopu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6222/9142/files/69587856197.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/jepofewejuxudupofifij.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_off00005841.bin
adf49d1fdb029001f9763c732da08d92a5b6820fa49e6ec407dd5755260b9f39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5841 5236 bytes
font_01_sfnt_off00006a0f.bin
e95f46c29f2e6fa09cda3512b02d40bab59f48adaa2ea0a6cc6d6b076d6cd369
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0F 10028 bytes
font_02_sfnt_off00008c9a.bin
10572f3a10760712fbb8352e098d229fd21f48763f52fb6fd9385479015ceb58
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9A 16060 bytes