Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fe8ae3781b23ba…

MALICIOUS

PDF

52.3 KB Created: 2020-08-06 23:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 275fcd950636a8679033057f639b4adf SHA-1: f9ed2dce35ec01ef9d10ab60bda7fff798d5ec87 SHA-256: 30fe8ae3781b23bae039087df151f461d96f7dada043118e441bb95982922dae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector at `ttraff.ru`. The ML classifier strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of numerous links, including those hosted on Shopify, suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted from this sample.

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=autonics+tk4s+manual+en+espa%25C3%25B1ol+pdf
    • http://kisawe.michaelvincentportfolio.com/uploads/1/3/2/3/132303035/e311dcc032eb5b8.pdf
    • http://files.livingwaterscooperative.org/uploads/1/3/1/4/131453698/zutizotoz_tulova.pdf
    • http://files.acollierastro.com/uploads/1/3/1/6/131607053/rovosiviwuxazum-rowemonedadix-futeja.pdf
    • http://files.christchapelmaine.org/uploads/1/3/2/3/132303075/foxigitodatipup-budosasap-dutameg.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/fiwejuvegavajimikatoza.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/kowivenekudoxesulomub.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/78792081304.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9781/files/categorical_syllogism.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/metenogilodesife.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/gozowereforagunal.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/zugijonebirigadomuze.pdf
    • https://cdn.shopify.com/s/files/1/0434/3758/8646/files/niguzuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/gopipaporejutaluwoxenawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/62671346312.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.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_off00006ac8.bin
6b8eefb24840b39171ee96229180ac6dfed8d8d8fafa059c5ff2b5edd01d6e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 5556 bytes
font_01_sfnt_off00007d6b.bin
130a8a836be9c0cb60db47dc92238934655e67a184e24b75f3c625754c080cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6B 15120 bytes
font_02_sfnt_off0000ac84.bin
1e6e3dc03332cc53d77147a068cf99156e57e0e2d49a13f8ec5e783694f6e605		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC84 16076 bytes

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