Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce29a5339869686…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 13:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb29e4a9c3be53ee293230b19af88cc3 SHA-1: 3cf497ba1b8187736bcef5b6e752839cfd3bfaf5 SHA-256: 4ce29a5339869686eb7030c5d9ac0899214900bf6d296fc0c2d149386baf1119
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a piano score. The document body and embedded links suggest a lure to a malicious site. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting the user to a malicious site via a deceptive document.

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=flight+of+the+bumblebee+piano+score+pdf
    • http://dujiket.rdcookingschool.com/uploads/1/3/2/3/132303219/womodubezidisafog.pdf
    • http://files.heatherraemagic.com/uploads/1/3/1/1/131164456/powunoxefoleju.pdf
    • http://pudulezuj.graphiclibrary.org/uploads/1/3/1/4/131437318/mevujodufilew_sefevuno_bosubunulun.pdf
    • http://poxed.oakleafcounselling.org/uploads/1/3/0/7/130775897/4c56963.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/regression_definition_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/48003477481.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/juvolavebarumipan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/zipegunumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/bony_to_beastly_workout_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/murufakij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/78455771439.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/weygandt_financial_accounting_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/titowoxigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/xopamat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6839/files/39796648605.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/65865855308.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_off00004bef.bin
5bced8ac99380f6da9c48e8020a04a9bc0af32199ce2e139eaf68fd5db148434
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEF 5664 bytes
font_01_sfnt_off00005f11.bin
2a2cddb1ec79444a8d0a904373b496669bfcac12164a4b26533489a77955b394
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F11 15100 bytes