Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c578893a859025…

MALICIOUS

PDF

42.0 KB Created: 2020-09-09 06:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd32e394ed216447afb7cc340bd56d5c SHA-1: 1861fe3482321dc9ec0536416f4cfa6850673bd6 SHA-256: a3c578893a859025fc59b8f1fcebd5beea92a9b81b1f60283e09e2c28e4bbd4c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL. This URL is presented as an 'IT application inventory template' to entice users to click it. The PDF also contains a large number of other links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=it+application+inventory+template
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/cisco_esa_advanced_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/69026282854.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/tegetajixizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/gapoze.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/microsoft_money_plus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/watermark_to_onlinefreeware._net.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/gowigelifir.pdf
    • https://cdn.shopify.com/s/files/1/0440/1790/9910/files/entrepreneurship_development_notes_for_bca.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/bts_world_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/40637457856.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/84783800420.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/mdb_error_depfile.pdf
    • https://static.usrfiles.com/ugd/3826db_143f1613514a477b9fa42c42fc099b2d.pdf
    • https://static.usrfiles.com/ugd/a474dd_55d0db7614b34b528a0e47bfc5225dff.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_aa52edeb5fc74ee58a35052da57a2e19.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dfd60b35f3e44b8b92fc60f917c2efa.pdf
    • https://static.usrfiles.com/ugd/cb5dea_207c0d417ebb46cd976dcf47981c4369.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_off00006825.bin
7986b8c71d8da3fab9febf9a26cd4d2b76569e4e86d2b786931fd8a2e277e2f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6825 5000 bytes
font_01_sfnt_off00007925.bin
d9df8bd4db9b63a0fb751e4d56c3001193de8b51b808b768be71ee5fbd795c62
pdf-font-stream PDF embedded font (sfnt) at offset 0x7925 9888 bytes