Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc6a4aa28701d38…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 09:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 254403d76fb61666685e2f1d74a55716 SHA-1: 8d747ec9f21d410514cdd7d1919893517af41920 SHA-256: 0cc6a4aa28701d38ac90e845247e58a7cb09454f24ee439d3f6e0861a91f9666
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, masquerading as a link farm for SAP BPC 11 PDFs. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to distribute further malicious content or phish users. No scripts were extracted, but the primary attack vector appears to be social engineering via document content and malicious URLs.

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=sap+bpc+11+pdf
    • http://tozavuwuw.welcometoboobeebooisland.com/uploads/1/3/0/7/130738731/vepagajol.pdf
    • http://files.acracademy.com/uploads/1/3/1/6/131606175/jinedaxudo_wibekigikubemat_nizemokitor.pdf
    • http://files.cathkerry.net/uploads/1/3/1/3/131379183/lifebuzabofa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/basug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/79874140370.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/emotional_intelligence_2._0.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/2805098634.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/didonofodesejosuzetidinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/56923992428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/11967480897.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/gugagemomunud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunugituvalu.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_off000067a2.bin
1c5fd5226a31aadc8b5f4acea18f1ee59948077eaee2a6f9a43690b6500e76f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 5136 bytes
font_01_sfnt_off00007933.bin
9882b1684a75d9c12af7f8ab19cf9ba7133f0549f237dfdb1c640e73ed221f96
pdf-font-stream PDF embedded font (sfnt) at offset 0x7933 10032 bytes