Malicious PDF — malware analysis report

Static analysis result for SHA-256 738de9e6e86d7cad…

MALICIOUS

PDF

63.5 KB Created: 2020-08-01 23:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddccb56bd916ff55b193c39c9dee2720 SHA-1: 337e701f281daa3c63aae4f4306f6eb101796e07 SHA-256: 738de9e6e86d7cadf780467cdfd455afdd4408fc14cf2b51583705640582dc6e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=docker+clone+container'. This indicates an attempt to direct users to malicious infrastructure. The document also contains a large number of embedded links, suggesting a link farm or SEO spam tactic. While no scripts were extracted, the presence of a malicious redirector URL is a strong indicator 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/pify?keyword=docker+clone+container
    • http://files.jujuic.com/uploads/1/3/0/8/130874338/1b39d759b2.pdf
    • http://files.7466caulkproject1.com/uploads/1/3/0/7/130776714/157360.pdf
    • http://files.passport2pain.com/uploads/1/3/0/7/130738701/kerigidixobu-tokumurupoj-jofamabum.pdf
    • http://files.lexihut.com.au/uploads/1/3/0/7/130739165/9857939.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/jolutujukelaga.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/19649414194.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/42465994748.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/11501780145.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/mipuxovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/xosojidugifizila.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/97675338208.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/kafogavawoberuwev.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/mufuvosup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/86213201152.pdf
    • https://cdn.shopify.com/s/files/1/0439/7616/3486/files/93316445741.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/37568583818.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_off0000b0af.bin
e36f701ce924e284418194f98af810261009919b6de0b75cf3522d6ce840c1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AF 4676 bytes
font_01_sfnt_off0000c0ac.bin
ff5ea2c78f906e0e9952c39089b0d23146b9edb6aa863ad101265f3dc6c5b18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AC 15404 bytes

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