Malicious PDF — malware analysis report

Static analysis result for SHA-256 53bf9347c8718e43…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 15:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbfc3569f7153350df2a5396fb0fff48 SHA-1: 5ba98e958ca9a573d1349d72b08e9ff6624a2fb6 SHA-256: 53bf9347c8718e43f91a4e0de67c84c1882f0996d0f30cc4def0999bb3cca526
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body also contains the URL https://ttraff.ru/pify?keyword=secure+vpn+free++for+pc, which is presented as a search result. Additionally, a PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with cdn.shopify.com being a dominant host. The ML classifier also flagged this PDF with high confidence.

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.ru/pify?keyword=secure+vpn+free++for+pc
    • http://files.debgileshockeyscholarship.com/uploads/1/3/2/6/132683014/netafoki.pdf
    • http://lulese.give60for60.org/uploads/1/3/0/7/130775118/0e8c24908ae.pdf
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • http://mikuji.mnreynoldsphotography.com/uploads/1/3/1/3/131380600/8620237.pdf
    • http://laninemiv.cindyprocterrmt.com/uploads/1/3/1/4/131411896/cce7cd3fd788.pdf
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/poe_a_swig_of_hope.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/ambiente_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/rodor.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/17203737825.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/container_dimensions_in_cm.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/57753197097.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/annotates_in_onenote.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/84644518055.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/70012703851.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7527/files/xajomelumuzatom.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/equifax_report_identity_theft_canada.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/58045746096.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000652f.bin
551257fa3c4f0808c33a0b2bad0b8d23df387efa7aac82ebca77b7aeed1a539c
pdf-font-stream PDF embedded font (sfnt) at offset 0x652F 4752 bytes
font_01_sfnt_off0000756c.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 1800 bytes
font_02_sfnt_off00007dfa.bin
5a1a1f2199240614696eb14db5101c95e30506cf48046048fa6960115edc8817
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 10120 bytes