Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec08967a87b70aa3…

MALICIOUS

PDF

44.1 KB Created: 2020-07-30 12:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09a9d0e88cad5103081ca3b4c68ce5fd SHA-1: 8f86e1d54a282ba99f1786167f075e9bd4eb0b58 SHA-256: ec08967a87b70aa3be3dd78173f70fb95e0ed241066b3bf70c349148e37aecf2
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended lure, but the presence of the malicious redirector link is a high-confidence indicator of malicious intent, likely for phishing or malware distribution.

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=burning+bright+ron+rash+pdf
    • http://files.inspirelove.net/uploads/1/3/1/4/131453399/0b09b68ceea081d.pdf
    • http://files.hartshillandharpfieldsra.org/uploads/1/3/0/7/130776150/1185917.pdf
    • http://files.pipain.com/uploads/1/3/2/7/132740763/857198200bd6.pdf
    • http://files.inspirelove.net/uploads/1/3/1/4/131
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/75921499064.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/sinedasekesavikinodabig.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/peguzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/kipujonebotogofozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niroduwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/femimemebefefawonotalatit.pdf
    • https://cdn.shopify.com/s/files/1/0439/0718/6843/files/17207112894.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/95361750285.pdf
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/nuvegofomivafobitasududa.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_off00007047.bin
7a3cca606bfcf94371948065c6dbeffa2980478b97249402dc4ab96b513722df
pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 5224 bytes
font_01_sfnt_off000081f5.bin
e28b5a752c0512ddd1e28cfc83532a3300e09b9e4ae3f27f6035960861099a79
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F5 9880 bytes