Malicious PDF — malware analysis report

Static analysis result for SHA-256 5221342b23ea3137…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 17:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e7d56b1c97a9170ec24e0cc9c147429 SHA-1: 281687913f2e71fbbb1d868e0a6b566f8ae3af16 SHA-256: 5221342b23ea313747259d862962e5c0b334858187abc655bb40ad591877457c
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.cc/pify?keyword=metodos+anticonceptivos+femeninos+pdf' is a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to lure users to this malicious endpoint. The ML classifier also strongly indicated maliciousness.

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=metodos+anticonceptivos+femeninos+pdf
    • http://files.ldowingslaw.com/uploads/1/3/2/6/132680808/xagonoku-jerekokika-somufuvukakak-detotokibax.pdf
    • http://files.myscribbleit.com/uploads/1/3/1/3/131379946/c1b30f5b7.pdf
    • http://bixim.ntfbiac.com/uploads/1/3/0/9/130969332/mezita.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/86380283350.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/23848996672.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/power_of_attorney_act_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/84405128806.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/panezisuwewudosinogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9513/8208/files/mebaxidebasegip.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/40446192876.pdf
    • https://cdn.shopify.com/s/files/1/0435/6508/8917/files/29603618514.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/jemerek.pdf
    • https://cdn.shopify.com/s/files/1/0438/9250/6779/files/access_control_system_book.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_off000075ba.bin
b31cd149bdd7f73d78675a52008c5a4d7479603c88bbce17ff3615003948a210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 5240 bytes
font_01_sfnt_off00008798.bin
abb3bfbdf13370a519d60b9cf0e30b451e076c2c378882604a502b9920361cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8798 10356 bytes

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