Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4edd7c911bb445f…

MALICIOUS

PDF

37.1 KB Created: 2020-08-02 04:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38753bfcdf41797c5d199016e6e7232c SHA-1: 9093a716626553aaf056d8380a9f49d0ca5f6d3e SHA-256: c4edd7c911bb445f7440564ac40068e748a17754bc55f39adffb46b32b068237
152 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to unmuting YouTube, which is a common tactic for phishing or malware delivery. It embeds numerous links, including a critical redirector to 'ttraff.ru', indicating a malicious intent to lead the user to harmful content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector is the malicious link embedded within the 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=how+to+unmute+youtube
    • http://files.pinetreecottage.com/uploads/1/3/2/3/132303013/dewokidexukixomidet.pdf
    • http://files.accidentalmusician.com/uploads/1/3/2/6/132682441/2305774.pdf
    • http://files.bijoucorfu.com/uploads/1/3/0/7/130775506/29ab667654134.pdf
    • http://files.shifa-shop.com/uploads/1/3/0/7/130739063/f59cc2165.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/47324548142.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/85143647869.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/18834284823.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/77718051356.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/18249710277.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/rewigatunixokeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/38136173144.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/94349461113.pdf
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/90082099510.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/gewimasofupipi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/7274201928.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_off0000559f.bin
1245676f4f1d7cf8c3f4b75993192efeb9dae8dabf984f190e4757226d00e57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559F 4612 bytes
font_01_sfnt_off00006558.bin
5b56c61beabb4982260dd196eec77349051dae6d457fc4b48ce21b9d6a51eaf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 10092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.