Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde76a5eb3780e32…

MALICIOUS

PDF

49.0 KB Created: 2020-08-27 16:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 062f4580b9bc2d264a8a960a895afa76 SHA-1: 05c6654afef58e02f145cef44a2b81e35eca5e32 SHA-256: dde76a5eb3780e323b1a6f3a84d276d5ef0014bba8b212db405a5d5da659a1dd
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One of these URLs, 'https://ttraff.cc/pify?keyword=volumen+corpuscular+medio+bajo+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a large number of links, including one to a known malicious redirector, strongly suggests an attempt to lure users to malicious 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=volumen+corpuscular+medio+bajo+pdf
    • http://files.winfielddsm.com/uploads/1/3/1/4/131437061/risebinivupoletojuz.pdf
    • http://files.thiarablueberryfarms.com/uploads/1/3/0/7/130739470/fe34c3ea33cb271.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/juborujubuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4099/6519/files/saxazizipakiwuti.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/72758643552.pdf
    • https://cdn.shopify.com/s/files/1/0433/0700/8168/files/center_periphery_relations_a_key_to_turkish_politics.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/48320573104.pdf
    • https://cdn.shopify.com/s/files/1/0461/4825/5907/files/18973388039.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/iracing_fov_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0447/8782/6854/files/goldman_sachs_asteroid_mining_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/zosul.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/latest_books_and_authors_for_competitive_exams_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ad.bin
8f81bd046d730c9534619d44c0858977c2f23af97bdc6263c0ffeb649da3f511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AD 5480 bytes
font_01_sfnt_off00007c38.bin
813905d892471117737fbc44b1031944e9db981fed689ee5da60e9aee2a1237e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C38 11072 bytes
font_02_sfnt_off0000a081.bin
da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA081 16112 bytes

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