Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d16cc8a0fd2447…

MALICIOUS

PDF

43.3 KB Created: 2020-08-05 11:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0deb3167c28904b9048635bfd4bce971 SHA-1: 6768edd3754f166c208d4f8f3cd2a36c0fe8937b SHA-256: 96d16cc8a0fd24475b97f5e2c91e4a66c9b32c56d43e56390f2d03a4d6b9f370
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body also contains this URL, along with numerous other links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a lure related to 'bohemian rhapsody violin sheet music pdf', directing users to a malicious URL.

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=bohemian+rhapsody+violin+sheet+music+pdf
    • http://files.midatlanticgsmdc.com/uploads/1/3/1/3/131381720/gaxamenanamaw_vojirom_noxoj_notikisudojipu.pdf
    • http://files.bestprimeproperties.com/uploads/1/3/1/8/131856041/3180697.pdf
    • http://files.flintmetroleaguesports.com/uploads/1/3/2/6/132695535/nawivukur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/process_dynamics_and_control_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/66690616175.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/bavejokovizexogekanogin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/rewixuxazigofes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/bibikelufuzukowupofu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/pemiwigibagesigubiwanitum.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/91372203841.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/xifip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/sonakiverojixim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/19249426588.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/bevadavoluleneko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9927/5935/files/filobelalalegek.pdf
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/46859029466.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/75186919851.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_off00006978.bin
edb48f5560398ef5f13d594a26d3b3aab75275f40cb4f2e511227d8d7511807b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6978 5608 bytes
font_01_sfnt_off00007c6f.bin
4e4ad77886eaf089c69bf38e9c321f071860a44b03a14c663c1937ff789dee66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6F 10536 bytes

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