Malicious PDF — malware analysis report

Static analysis result for SHA-256 62690d5676f1f17d…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 21:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24f498d878584d9cea792118030ab042 SHA-1: 0d00f21705933a0a4078f4eebf6576dededbd7cf SHA-256: 62690d5676f1f17d20eb16be68fc788d4a5d246c63b82e49c8c96299cc207bb9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or proxy further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious link.

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=game+ps3+god+of+war+4
    • http://files.sakivintagekimono.com/uploads/1/3/1/4/131437119/gifukix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/calculus_by_james_stewart_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/agriculture_information_and_training_centre_nepal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/25996672461.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/kiwejoxolazikasiwunarel.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/bari_italy_tourist_map.pdf
    • https://cdn.shopify.com/s/files/1/0454/5295/1704/files/practical_skills_in_biomolecular_sciences_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/french_definite_and_indefinite_articles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/jipofedupasasafogofejava.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_off0000767d.bin
a74989a8efce68d93f402195370b7e03c1425db6be1bbed9c4b608b481da9954
pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 5704 bytes
font_01_sfnt_off000089f1.bin
54a93e8562ee9b5111d57ca11abb85b647b81bd20bc04ed825cef41fd46de369
pdf-font-stream PDF embedded font (sfnt) at offset 0x89F1 10308 bytes