Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c6f025374170d1…

MALICIOUS

PDF

41.4 KB Created: 2020-08-14 17:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025937bf33ac19b67801022ffc886c5a SHA-1: f920e64ed467a9e6a27428c4eb30a5171dd042d7 SHA-256: 01c6f025374170d1a1cfc08913785935106b39075d3c9af6e84e2a2a141e18da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=corpus+christi+school+nagercoil+uniform', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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=corpus+christi+school+nagercoil+uniform
    • http://files.lunartouchreiki.com/uploads/1/3/1/4/131438018/05b6f58df2cb5b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/xukofuwenemiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/analog_digital_conversion_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/kaplan_step_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/anthropometric_measurements_in_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7541/files/duxaludevevivekavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/84036088335.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/43885266697.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/60676424811.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/jimixefej.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d90.bin
1a7fa817769225b2320c1a995ceef35747c4e3f420c62edc0485dc1275dab3d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D90 5332 bytes
font_01_sfnt_off00005f83.bin
f3b79e84fa6ea08ea49e457beb90aeb3249e21c6934c62f7f1afe3a58c9a77a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 10552 bytes
font_02_sfnt_off000083ab.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 16164 bytes