Malicious PDF — malware analysis report

Static analysis result for SHA-256 3473e6cd220c32c7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-15 10:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9181c72fdc93b89975f0cfc065bf7f SHA-1: 4b1da31a66c13d16d4f8126018c4bd69c20b686d SHA-256: 3473e6cd220c32c7cd5345ffd9a753ffa0557e12f01db953d6d25166127e2822
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a document about leptospirosis treatment in dogs. The document body and heuristics indicate a link farm strategy, with numerous links pointing to Shopify-hosted PDFs, likely to improve search engine ranking and distribute the malicious redirector. No scripts were extracted from this sample.

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/wb?keyword=leptospirosis%20en%20perros%20tratamiento%20pdf
    • http://files.warwickvalleywrestling.com/uploads/1/3/0/8/130874526/nowiwuwusunev-wixetukezubadi-telajaxewabume-dovidog.pdf
    • http://files.reclaiminghopecounseling.com/uploads/1/3/1/3/131384555/koxejizuzagu.pdf
    • http://files.hiphopandhomeruns.com/uploads/1/3/1/4/131437977/9731066.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/99924688501.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/73955505575.pdf
    • https://cdn.shopify.com/s/files/1/0448/3537/3213/files/phonetic_symbols_with_examples_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0440/9786/3832/files/75409472363.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/guwuliwuro.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/pabiwilalinogasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/vifukufimizudizeju.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/hidden_street_maplestory.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/xokajav.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/pabefepawotawumatuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/lojapizuzi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/99063568319.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/lofezoxuxasafemediwuvi.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_off00006a3b.bin
46ddf1a4a8165b8e5f627e8f136800491de35fe05f7066403a2bb4e4e4c13c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3B 5096 bytes
font_01_sfnt_off00007b7a.bin
89b7df1b2defc1fe12d30452d2d3622f00bd51e1a8afaa80a34adbb0f9c848c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7A 10724 bytes

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