Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5ef9e3bbfaf65f…

MALICIOUS

PDF

45.1 KB Created: 2020-08-04 16:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba16274abac7c3e32e720a236e6528fa SHA-1: 51253e2dbfc4efe73c3fc72b2ab01a34d892ec8d SHA-256: be5ef9e3bbfaf65f7385b838d35f045f342e32bc915c3646445d65b33c6899ec
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=statistical+analysis+handbook+2020+edition+pdf, which is likely used to redirect users to a malicious site. The document body contains garbled text but includes the malicious URL and a seemingly benign document title, suggesting a lure for users. 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/pify?keyword=statistical+analysis+handbook+2020+edition+pdf
    • http://files.deebibliophilia.com/uploads/1/3/2/3/132302872/336979.pdf
    • http://files.combscoffee.com/uploads/1/3/0/8/130814397/fabimufovaleras.pdf
    • http://files.edgingtonroaddistrict.org/uploads/1/3/2/8/132815748/bimezutewavanuk-topebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/angles_in_a_triangle_worksheet_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/kofuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/43028580197.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/nissan_titan_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/gimp_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/waposomiwomobigose.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1480/files/17558426053.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/25189274890.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/wosadas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0706/files/92789944119.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/dagal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetidolurat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/mivuveluxurosur.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/
    • https://cdn.shopify.com/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006233.bin
f83b600a439dffd8c92ec14c5461b8fdc7cb11c0c4393fe55c2c11bb84c1af22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 5616 bytes
font_01_sfnt_off00007534.bin
b4ec81d1fa6e6415a77dec46376ce0e879a5d5d92584bc1780e4565d7c9cdc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 10516 bytes
font_02_sfnt_off000098f9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F9 4324 bytes

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