Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99e3afca0d85216…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 03:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e6e08b0aa59a8f2e3198e6854d8b274 SHA-1: f9b9f18ea5e17c14c72c6efdf4966f73816f7703 SHA-256: c99e3afca0d85216586292ab7eec7e104470b5076e36b79e3c54ee15caa3f603
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'Destiny 2 pvp guide 2019' which redirects to a known malicious redirector at 'ttraff.ru'. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

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=destiny+2+pvp+guide+2019
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdf
    • http://files.archipelagics.org/uploads/1/3/1/8/131856146/zuwisanubap_worabavo.pdf
    • http://files.goldcoastcreatives.com/uploads/1/3/1/3/131380342/6901579.pdf
    • http://files.hannabruer.com/uploads/1/3/1/4/131437976/figuworudi.pdf
    • http://files.beepbangboombox.com/uploads/1/3/1/4/131453944/sulatekopas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/xovasagetigazudutaxojoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/16331742627.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/59780398335.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/best_german_grammar_book_for_beginners_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/benipuwej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/jemorig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/online_chat_apps_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/jefimufarufixevoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/aahe_manohar_tari.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000679b.bin
b3bfb45dc04f227e771213690c3f5f84c6a77c7d19a8a042ac568a1e992ccc9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x679B 5432 bytes
font_01_sfnt_off00007a42.bin
c56965ad8e7c901123fc36efc8df0b9b591902e0f7ea0eb145894baf22289c73
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A42 10412 bytes