Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12a78e367c71cbd…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 13:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b97ef7a7a6c7028311ae239b3e6a921f SHA-1: dd421d4687beafa75f3be4b679bcc067d9042238 SHA-256: e12a78e367c71cbdcde81550a3194655daec5a6f0310a060f889478907258a59
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=d+d+5e+character+sheet+editable+pdf, which is presented as a Dungeons & Dragons character sheet to entice clicks. The document body, though heavily obfuscated, contains references to this lure and the malicious URL, confirming the intent to redirect. The ML classifier also strongly indicated maliciousness.

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=d+d+5e+character+sheet+editable+pdf
    • http://kerimevaz.afhdesigns.com/uploads/1/3/1/4/131482975/kesud.pdf
    • http://files.michellehowelldesign.com/uploads/1/3/2/6/132682925/2aaf8178.pdf
    • http://files.jujumask.com/uploads/1/3/1/3/131379875/169665.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/sevazexisagoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/rovidasejikovobanivaxulal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9740/files/git_branching_model.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/jutajabukukegefuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/fixiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/pregnancy_and_human_development.pdf
    • https://cdn.shopify.com/s/files/1/0440/2007/2613/files/83316262316.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/zuzusabuvexemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/vogukagaziwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/48967425026.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/business_plan_for_bookstore_cafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/passione_pizza_antonino_esposito_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/business_english_vocabulary_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/84455756010.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_off000068c0.bin
1eda42317efad48d944e1355b5c10c9b2d0795a962573c13afb75a6089d492bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5504 bytes
font_01_sfnt_off00007b72.bin
da8d42c0b7de2d6b7e7d4d47ec427cab7d53e2b693e7aff69ca7fd199a522f22
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B72 10488 bytes