Malicious PDF — malware analysis report

Static analysis result for SHA-256 518b28da8194c7f0…

MALICIOUS

PDF

47.1 KB Created: 2020-08-09 13:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a00241d836ab81f2316fcc174318d89c SHA-1: 7fe0f741aa2c28f588690a04160901059c38a7f8 SHA-256: 518b28da8194c7f0e15ee4ac555b9b2d328c09e68ec4a458c234251eca6ea8c2
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to link farms hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cerita+rakyat+papua+pdf'. The document body, though heavily obfuscated, contains text related to 'Cerita rakyat papua pdf' and the URL 'https://ttraff.ru/pify?keyword=cerita+rakyat+papua+pdf', suggesting a lure to trick users into clicking malicious links. 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.ru/pify?keyword=cerita+rakyat+papua+pdf
    • http://fuxugik.aikidoandjudolifeschools.com/uploads/1/3/1/4/131409090/3317889.pdf
    • http://saxepizaf.medlock5150.com/uploads/1/3/1/4/131438641/danuzit-sabisonixum-ravipuputixij-wekadoko.pdf
    • http://files.audraoakley.com/uploads/1/3/1/4/131406739/wujavagatirojeteve.pdf
    • http://files.swcfcu.org/uploads/1/3/1/0/131070434/tojasamufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/9371657391.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/kiwufawifuze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/street_fighter_alpha_3_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/66062955081.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/why_should_you_receive_this_scholarship_essay_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/95801750874.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/66973213564.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/dejanudenaxasofijasawut.pdf
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/2013_audi_a7_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6840/files/93958550132.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/34893663993.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/nuropujuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/46022699089.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/69163851249.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/destiny_vault_of_glass_armor.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_off00006d95.bin
2895b52db9dc432e9ab82ec3470146326baaedf5e26233632e684d7e7ee7b6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 4680 bytes
font_01_sfnt_off00007da1.bin
9c41d4235631941249d053cb7bea2e5fc88f5cea959fdf018898e53774990203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 10384 bytes
font_02_sfnt_off0000a127.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA127 4324 bytes

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