Malicious PDF — malware analysis report

Static analysis result for SHA-256 175081c8f01145fb…

MALICIOUS

PDF

41.1 KB Created: 2020-08-16 22:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a04b42c76c864a9ce0cd4cae61c19340 SHA-1: 980bdc7bea11f689efbedc0f11403f85866e4b1e SHA-256: 175081c8f01145fb1eaa42fc524fcec0928393d7dac50f7f743d975afad95336
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=excel+bedingte+formatierung+text+zwei+bedingungen, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to Excel formatting and the URL, suggesting a lure to a malicious site. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirection attempt.

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=excel+bedingte+formatierung+text+zwei+bedingungen
    • http://files.futurizeyourself.com/uploads/1/3/1/0/131070161/9132984.pdf
    • http://files.mareacraig.com/uploads/1/3/2/6/132696598/c5dee2c0.pdf
    • http://jekakif.northbrightonrecording.co.uk/uploads/1/3/1/4/131437657/xedalemivaka-luloxexonor-zujabefen-zifuwesekunul.pdf
    • http://wimixofi.marthaannepalmer.com/uploads/1/3/0/8/130874493/zavobodewawezad.pdf
    • http://files.xingyibo.com/uploads/1/3/2/7/132740547/307590.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4859/8678/files/luxipasekazenomobiloxum.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/1401698892.pdf
    • https://cdn.shopify.com/s/files/1/0432/0375/6196/files/godadedasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/38633047675.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/remove_character_from_string_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/68460848632.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/general_issues_on_environmental_ecology.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4296/files/alman_dili_qrammatika_kitabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/geometric_design_of_highways_and_streets.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_off00005f56.bin
36ddc601aa5fc100ca107313adfcdd51a145af4d85cb6af7693e084cc67810be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56 5472 bytes
font_01_sfnt_off000071ef.bin
5fc22b819ec441a7528bc45ae7cb83b2c4e08e37dc4e220fc3b13a6387f69a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 11432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.