Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b949285c57b415d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-13 19:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7292780ebf35961c111a93d683a5b1fc SHA-1: 1f009b2b3ece95fed44547499116345aad3fd34c SHA-256: 0b949285c57b415d8184560bce889d5cc7af54dac91235ed8d75b13589936bfc
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.ru. The document body and embedded links suggest a lure related to Adobe Acrobat searchability, likely intended to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a high likelihood of malicious intent.

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/wb?keyword=adobe%20acrobat%209%20make%20pdf%20searchable
    • http://files.fidgetkids.com.au/uploads/1/3/1/8/131856492/d5ab83fc151cee.pdf
    • http://files.erikkuska.com/uploads/1/3/1/3/131383493/jenapusemewobom.pdf
    • http://files.cleoejacksoniii.com/uploads/1/3/1/4/131437484/zenupuguputug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/ahrc_form_3924.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/64885173934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/wimonu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2093/files/71221555535.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/hotel_company_profile_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/vedigadebidepigaponet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89377355024.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/24478710771.pdf
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/technicolor_tg582n_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006340.bin
96c90b9918147b740c5bc07a8d987a21dedf0600d3074d65627153b9fd262622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5376 bytes
font_01_sfnt_off00007584.bin
6e807dab9e52578c9a84b5bb4124bcbc1970e87a73149f47314cc2fc770632e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 10740 bytes
font_02_sfnt_off0000998e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998E 4324 bytes

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