Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d113d79cd1d0ec…

MALICIOUS

PDF

56.3 KB Created: 2020-08-15 01:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fa9b1966dd9e5e5b57ae2381465fb79 SHA-1: 14b3845df21a485ed1e69d8c18d8dc2ef1407094 SHA-256: 04d113d79cd1d0ec4471925c9f4b9b01da25a9a76427b59f00eeb13c32256bee
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=gopro%20hero%205%20session%20manual%20dansk', is designed to lead users to potentially harmful content. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to distribute traffic or host malicious content across multiple sites. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or malware distribution attempt.

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/wb?keyword=gopro%20hero%205%20session%20manual%20dansk
    • http://malixafiw.boonerplots.com/uploads/1/3/0/7/130738546/sovunuba.pdf
    • http://files.jewelerinthewoods.com/uploads/1/3/2/8/132814071/rorunik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/6450611422.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/55522753168.pdf
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/kidixegeragejusobox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/bigokilibaxumuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/filiwodevunifikokumadoz.pdf
    • https://cdn.shopify.com/s/files/1/0443/6430/0444/files/calendario_serie_c_19_20.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90142435821.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/71155516433.pdf
    • https://cdn.shopify.com/s/files/1/0434/6727/6454/files/69347909659.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/bobejivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/47269317954.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_off00009a6a.bin
f191668d990c3488b53865da01aadc80c62b895e0a15ae95d7d5adbd71142727
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6A 5420 bytes
font_01_sfnt_off0000acaf.bin
657e19e6b1d6b5daf7612673c67e71016daf2f564aa9483b24f978877ee89ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0xACAF 12072 bytes