Malicious PDF — malware analysis report

Static analysis result for SHA-256 1042180cf04037e2…

MALICIOUS

PDF

73.9 KB Created: 2020-09-03 00:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d3c0914dd0e8cb896fd1f015359e595 SHA-1: 6e740b65f102278c1d4e3cdf4cc1428328ebe8f0 SHA-256: 1042180cf04037e2878dd0dfea31909652ff8bae32b2b188487c7d536898886b
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 pointing to 'https://ttraff.ru/wix?keyword=smartphone+caterpillar+s31+16gb+4g+android'. This URL is likely part of a phishing campaign designed to trick users into clicking on it by disguising it as a product search result. The PDF also contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme to drive traffic to malicious sites.

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/wix?keyword=smartphone+caterpillar+s31+16gb+4g+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/83b1b3_98bcaa22ffc2445e922fc4fd92ea0f7b.pdf
    • https://static.usrfiles.com/ugd/4fb05f_06c51f6bf2ca4a62b7357e29e9d448ca.pdf
    • https://static.usrfiles.com/ugd/902d29_3c527874e8dd49ae9bb1f467091da640.pdf
    • https://static.usrfiles.com/ugd/b8c837_54074f6595154449b2e999a8656ee5d4.pdf
    • https://static.usrfiles.com/ugd/e1c37d_0c08c8f635b7412f876d28cfc177abaf.pdf
    • https://static.usrfiles.com/ugd/aff7ca_4bfa52ceb57246d4a9cbd73bc6e00206.pdf
    • https://static.usrfiles.com/ugd/145364_9899537d6f4c49d4b8e3708b4da47187.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/for_you_staind_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/34731353510.pdf
    • https://cdn.shopify.com/s/files/1/0463/3401/7691/files/nojafikazamenimikepotexev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/76443436417.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_off0000b917.bin
d27ea85d15c6799e3207e28f02ac3721d3244e2541ba0abedaf41812bd95c3fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xB917 6188 bytes
font_01_sfnt_off0000cdf2.bin
1244d8eefb19699fdd7e2e245b1da8f9d7f33450c40c717847b5906fdfb3073a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF2 17528 bytes
font_02_sfnt_off00010326.bin
703d2f0bb67c3ec11081c98b0f886f1b31f4ca89e298fbe9822425ece795f450
pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 16136 bytes