Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e57dacf6b2a5d3…

MALICIOUS

PDF

41.1 KB Created: 2020-08-24 15:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024a524a08b23708f1869850138762cc SHA-1: 9e3f1ec6a22228129939785ce8f9659d138919c1 SHA-256: 36e57dacf6b2a5d31b1eb08fd4993eaf676a79216f31c467f3b289894e375e5c
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL `https://ttraff.ru/pify?keyword=happy+birthday+sheet+music+for+trombone` is identified as a malicious redirector. The document body contains garbled text but also includes this URL and other Shopify-hosted PDF links, suggesting a lure to a malicious site disguised as legitimate content. 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=happy+birthday+sheet+music+for+trombone
    • http://files.peterlynas.com/uploads/1/3/1/3/131383333/dovorami.pdf
    • http://files.johnsclassiclures.com/uploads/1/3/2/7/132712323/893646.pdf
    • http://files.thechocolatebar.shop/uploads/1/3/1/4/131438835/526cd6c8072d79d.pdf
    • http://files.yauponberrypress.com/uploads/1/3/1/6/131636806/64eeb1.pdf
    • http://files.pawsrehab.net/uploads/1/3/0/8/130873958/suvatagetage_pukuzena_ziwikodo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/all_star_movies_resort_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/xefolijotef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/zixijejekidoregagubiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/automata_theory_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/tafulirif.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/noral.pdf
    • https://cdn.shopify.com/s/files/1/0435/6436/8021/files/free_after_effects_templates_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/4431932216.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/75683009743.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/52386956931.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_off00006271.bin
fdaa0d8c9e01377142722ca90fb16d863fd78240356057566f6423ae16c37766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 5564 bytes
font_01_sfnt_off0000752f.bin
f95f3e78df83c3441caeee4680075913e318de1e74e4422d0915f29a17483ded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 10088 bytes

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