Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3e95430083c453…

MALICIOUS

PDF

39.7 KB Created: 2020-08-25 01:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec188b1a61c69b39a1780a24e68d351 SHA-1: 403b58988fc55be01dac252c8065ec15b8d51321 SHA-256: 9b3e95430083c4538fe58a06b5f753820ca8200a92ad5e641600bad924df4496
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=avatar+star+mobile+apk'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on Shopify domains but point to potentially malicious content. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure the user into clicking the link for a malicious download or redirection.

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.com/pify?keyword=avatar+star+mobile+apk
    • http://nafere.seaportquilters.org/uploads/1/3/1/1/131164250/74b66e0b8446b9.pdf
    • http://files.thisisitspaandsalon.com/uploads/1/3/1/1/131163878/kovewudeligolu.pdf
    • http://files.florologie.com/uploads/1/3/1/4/131407179/a400df88d0d3403.pdf
    • http://files.jpattersonwildlifeart.com/uploads/1/3/1/8/131856430/fa4cc.pdf
    • http://nepepuk.belladaisyevent.com/uploads/1/3/1/1/131163635/vevebasew.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/meningococcal_meningitis_prophylaxis_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/adobe_acrobat_pro_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8994/files/10793022562.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/3140407248.pdf
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/xemelulabuxadubizig.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/98173885742.pdf
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/data_science_and_big_data_analytics_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/67212514246.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/40934825388.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_off00005da1.bin
4025f4f165d764f0d06dd9f8bc11fb970dee58d36e4fa094d1869ba6352af584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 5216 bytes
font_01_sfnt_off00006f49.bin
d60bc870341c2fd1d4aee9fa6ea1f8a17275cf125aadc739533dd858c5bd34ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 10296 bytes

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