Malicious PDF — malware analysis report

Static analysis result for SHA-256 04948785d2959e33…

MALICIOUS

PDF

35.2 KB Created: 2020-08-11 15:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc1bb9c7eb8cafe26d37749f0060250 SHA-1: 5de5ccf696f3d72ee385a2b0a0b03b093d70de81 SHA-256: 04948785d2959e33fba938a49bf9e9d13749a39b8aaa8dee360b63f48454b5bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is part of a link farm designed to distribute malicious PDFs. The document body, though heavily obfuscated, contains the same malicious URL and other links, suggesting an attempt to trick users into clicking through to potentially harmful content.

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=encyclopedia+of+general+knowledge+by+jwt+pdf
    • http://files.estateart.net/uploads/1/3/0/7/130740493/1efb2e342fe28b3.pdf
    • http://files.teachablemoments-ok.com/uploads/1/3/1/4/131437685/0e5b04d0fe.pdf
    • http://xogim.solaris7roadshow.com/uploads/1/3/2/3/132302815/zijazudun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/75556187790.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/tapezadojijasulijun.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/polaris_trailblazer_250_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/93360940276.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/fawuvup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/biodata_maker.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/vinidekavumewibinaxizewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/27777954934.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/11549590484.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/feregimikevimadizegijew.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_off00004a51.bin
4d426e82ff1e214b358223518d51f7d84e0f47bf9abea8d3caac62d3565dc4e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A51 5576 bytes
font_01_sfnt_off00005d72.bin
71a0af9c65e172b91974a8d8a2c838d4cf988c717d1979d02aa497278379fa1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 10144 bytes