Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d6b176b956bd0c…

MALICIOUS

PDF

55.9 KB Created: 2020-08-02 11:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e03d054a4be15bba5fcc0c76da7d5e0 SHA-1: 445a0eed3daafa6d716019b422bb95d072f6513d SHA-256: e4d6b176b956bd0c5e6980f52ff4077f5fd00f8715356970ee2af96124085f2e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to 'Minecraft 1.9 xray' and a critical heuristic firing indicates it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=minecraft+1.+9+xray
    • http://files.ethelbustamante.net/uploads/1/3/1/4/131406356/7012749.pdf
    • http://files.vagabond.sk/uploads/1/3/0/7/130776081/7386250.pdf
    • http://files.ps213q.com/uploads/1/3/1/4/131453402/6720485.pdf
    • http://files.top-tungsten.com/uploads/1/3/0/7/130775129/516ee74d4.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/aci_318-_14_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/nimokevigevuxesojifakuvev.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/78610614792.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/kadefarumofelokokolidew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/76672377106.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/jotevijibavesovozo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/70883968635.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/zolunofug.pdf
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/kayla_bbg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/85693978294.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9633/files/xetireluludiwamiposod.pdf
    • https://cdn.shopify.com/s/files/1/0437/4229/8264/files/59621459418.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/nokol.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_off00009cab.bin
8fcb246423fbeb3e3b6791ad2f7cf5a4046230442693260ee784b84b643b2f44
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAB 5080 bytes
font_01_sfnt_off0000ae30.bin
90cb69790019cb58a88a9aa2ee4f50be2ab665a59e1c0341123f0cddb0b9a220
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE30 10668 bytes