Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae4e613b3b5d6fe…

MALICIOUS

PDF

45.5 KB Created: 2020-08-30 11:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4cafdcc1296b091ba2135cfbd008936 SHA-1: 1c0d33874a013a38c55a296cb73399186a699ebe SHA-256: 6ae4e613b3b5d6fe98d1bfe1bfbbdba6640fb702f495241d9d5c228d56703183
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/wix?keyword=marcelo+bielsa+tactics+pdf'. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or to serve further malware. The ML classifier strongly supports the malicious nature of this document.

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.com/wix?keyword=marcelo+bielsa+tactics+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6901/4165/files/bulleh_shah_books.pdf
    • https://cdn.shopify.com/s/files/1/0451/9487/0935/files/broadcast_journalism_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5769/files/89597470473.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/tuvel.pdf
    • https://static.usrfiles.com/ugd/f46427_315f7cb2990f47d9adfe67189b0e0798.pdf
    • https://static.usrfiles.com/ugd/724fb5_c9490358c7b54deda37856a213f65a3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd6b989234fb4b62b9efc3dbff31a08e.pdf
    • https://static.usrfiles.com/ugd/b4609a_d298dff2d24b4fc5976f34e9d3c34969.pdf
    • https://static.usrfiles.com/ugd/d1c05f_82c1d39026884e1b91fbe8ea62604ba0.pdf
    • https://static.usrfiles.com/ugd/b8c837_184b8fb892aa49e5bf07b8003eeaf816.pdf
    • https://static.usrfiles.com/ugd/b8c837_86e0a1df3c06419284ae1ae96e394199.pdf
    • https://static.usrfiles.com/ugd/b8c837_a644aabf54cd4891aee24555feb8c015.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/blue_protocol_ultrasound.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/lanepolumategumibinazo.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_off00007482.bin
a49abd0b1ba3059a2e9a48f352b2e62012303bae7b9e9bd906ce69edcf51bd21
pdf-font-stream PDF embedded font (sfnt) at offset 0x7482 5292 bytes
font_01_sfnt_off0000868a.bin
7e49a26cb29df4db062313e6d08b97ef5e731d71890a130f5b8d13b08acc563b
pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 10508 bytes