Malicious PDF — malware analysis report

Static analysis result for SHA-256 294b0429a29ef0cd…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 16:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b05b1190e7386c688af82ca3578e10f6 SHA-1: 883f346d53ee6bf5691541847c34706c7f381d53 SHA-256: 294b0429a29ef0cdda94b2be6b11f64c331b3f4944d9d00270726064bb6035e5
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by multiple heuristics, including a critical finding of a malicious redirector link and a PDF link farm. The embedded content, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=instrumentation+amplifier+using+op+amp+pdf, which is identified as a malicious redirector. The document's structure and numerous external links suggest a campaign to lure users to potentially harmful sites.

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.cc/pify?keyword=instrumentation+amplifier+using+op+amp+pdf
    • http://files.thewackywitchcupcakecandlefactory.com/uploads/1/3/0/7/130739143/053ebd4.pdf
    • http://files.artchaucer.com/uploads/1/3/2/7/132710601/bezox-papep-bosexesokuxuwus-kijetese.pdf
    • http://files.scottyanco.com/uploads/1/3/2/3/132302942/5949817.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/63355007816.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/pabizosu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/12439677662.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/systems_understanding_aid_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/mcdougal_littell_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/jogunusibezupoxoki.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/calculus_early_transcendentals_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/rambo2_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0440/6388/3429/files/71629461498.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/kasilosolijirus.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_off0000679e.bin
28002fbebfe942237ad43edf810b0b0e4fe850d99cacbfebcc66f3bf1a5f5cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 5296 bytes
font_01_sfnt_off00007989.bin
e825cdf3b09459c75d1003726c694dc6e6f901dd92c556ea4b1c29d0b5bb5966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 10328 bytes

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