Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ab15a3f103942f…

MALICIOUS

PDF

51.0 KB Created: 2020-08-24 01:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72baf08abfdad675de170d047c237521 SHA-1: f4ef33ef51cffb3a4138cf64434653a69e595e09 SHA-256: 10ab15a3f103942fc5eae6f98ad9ff4ea6269a40eedbf2e892290c3a68abc1b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting the redirector, which likely leads to a malicious payload or phishing page.

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.cc/pify?keyword=vcds+lite+1.+2+activated
    • http://files.artofjfr.com/uploads/1/3/1/8/131871602/81afb37afe9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/pepoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/pikerolapeza.pdf
    • https://cdn.shopify.com/s/files/1/0437/6107/4337/files/nujikebufefob.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/35021048687.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/88564633362.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/1680730865.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2023/files/wifebotalorogunonuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/pewobuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000895d.bin
e7f7ec5a79b5e33a0f4eace7dad38caf32f7a82d3bba6eade07cd1d0408620d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895D 5076 bytes
font_01_sfnt_off00009ac0.bin
9007a52fbbd6315747ba04bfa036d0775833170990a4a4fdab1c7af7236e79da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC0 10852 bytes

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