Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ae29b4269b0894…

MALICIOUS

PDF

36.6 KB Created: 2020-08-16 12:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f110cf0b77c8f736e819256225a1aa SHA-1: 0b35404224331669169380d7072b0df9e2334004 SHA-256: 08ae29b4269b08941268a18cd09068c9b5a01fafdf541af7650a04763d5ef741
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, suggesting a phishing or scam attempt. The document body and heuristics indicate a lure related to online PDF conversion, likely to lead users to malicious content or further compromise. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support this assessment.

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/wb?keyword=convert%20online%20pdf%20to%20word%20ocr
    • http://files.hudsonfoodcollective.com/uploads/1/3/2/7/132710704/gotaxikuki.pdf
    • http://files.healthexinternational.org/uploads/1/3/0/7/130738881/rowuza-gasefoluka-bexozurelu.pdf
    • http://files.twoshade.com/uploads/1/3/1/3/131384777/6180219.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/92358775067.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/79323594470.pdf
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/cfa_level_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/86200825543.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/rizig.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/up_up_and_away_song.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/cobra_mag_id_unturend.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_off00005288.bin
a0e7492b9df0e42c6afced744bb172bef72dd4e800ffdeec396678cd5a314575
pdf-font-stream PDF embedded font (sfnt) at offset 0x5288 4816 bytes
font_01_sfnt_off00006314.bin
b0d2143dd473ade222a8d1c82f11224326cd593b5756a48fe7efbaf1aae26563
pdf-font-stream PDF embedded font (sfnt) at offset 0x6314 10192 bytes