Malicious PDF — malware analysis report

Static analysis result for SHA-256 56275c37f865e88b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 20:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 970fcd95e508d2cc42fa57dd74f58588 SHA-1: b1ae66e8cdb88e644c67a88b70d2704d101145be SHA-256: 56275c37f865e88bf841a2e2950e6e91c736ec31a6a36621fc5217b0955d9cfe
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'baby shower ideas' and the malicious URL. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document. The primary attack vector appears to be directing users to malicious sites via embedded links.

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=baby+shower+ni%25C3%25B1a+ideas+manualidades
    • http://files.adventure360.co.uk/uploads/1/3/1/4/131405977/510417.pdf
    • http://bubox.razzaqcounseling.com/uploads/1/3/0/9/130969858/movirifegowof-buxogija.pdf
    • http://files.lifetransforminghabits.com/uploads/1/3/1/1/131164239/95a5c.pdf
    • https://cdn.shopify.com/s/files/1/0435/0912/1184/files/alphabet_animals_flash_cards.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/strength_of_materials_class_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/35340251643.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pijajaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/simple_wildflowers_wow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/albrecht_durer_biography.pdf
    • https://cdn.shopify.com/s/files/1/0434/5482/4598/files/beery_vmi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/lekujopamut.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/mathematical_analysis_by_tom_apostol.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_off00005b19.bin
128df3e43887ddd284a5b700bb13ffc4d14450d4bc6d98c7095ba2e8700ea3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B19 5460 bytes
font_01_sfnt_off00006d32.bin
952b02d52c0435bc545a08649437d6f3e4780f597f6adb6aefe746e8b0a81bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 9344 bytes
font_02_sfnt_off00008cda.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 4324 bytes

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