Malicious PDF — malware analysis report

Static analysis result for SHA-256 547661fd8d77168b…

MALICIOUS

PDF

69.9 KB Created: 2020-08-19 15:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2ab08bd02f83a90fa318fc92823674e SHA-1: e97e6ec45824ccf9cfe1e96b111fc7b5de523bdd SHA-256: 547661fd8d77168bd9f1833678471857751aee08af4c78a619f455daa676c28f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=distrofia+canaliforme+di+heller', is identified as a malicious redirector. This suggests a link farm or redirection attack designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=distrofia+canaliforme+di+heller
    • http://bezide.jimbatt.com/uploads/1/3/0/7/130775680/7062338.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/everspace_sentinel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/noxiwuzivi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/vilawimera.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/sienna_guillory_resident_evil.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/93610232279.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/pagugupid.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/neladuwubulat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/suzaniwejifibogavetota.pdf
    • https://cdn.shopify.com/s/files/1/0430/9785/0017/files/85655619591.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/15067782458.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/elements_of_electromagnetics_sadiku_5th_edition.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a9.bin
b255ca3c9fdbe6a76b016c88124c4c19f6f479e974680f4d39a316423a51c08e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 5260 bytes
font_01_sfnt_off0000e753.bin
8a8b6ef10c666e220510df53e2e2e7195558fc6d45fafb05ea2e28623b890918
pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 10376 bytes