Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a7e72c2adebcb…

MALICIOUS

PDF

34.7 KB Created: 2020-08-23 05:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f748462de38b6d7a91a5672274cc0e SHA-1: 4c18294195982b14d3b55f62c2a9ef0c4b75ff55 SHA-256: 8e3a7e72c2adebcb5a57285731d5f68aa61ff8281753bea1dfcf9cfb373cfd35
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'final countdown sheet music keyboard' and a URL that appears to be a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=final+countdown+sheet+music+keyboard
    • http://files.edinburghacupuncture.com/uploads/1/3/0/8/130814529/tanusavovog-maromojeneximo-duxafigezomu.pdf
    • http://files.isshsvisualizations.com/uploads/1/3/1/3/131379949/dabarutezujudoken.pdf
    • http://fawoguzeb.chartingwithkatie.com/uploads/1/3/1/4/131407197/7926301.pdf
    • http://jeroze.fundle.us/uploads/1/3/0/7/130775380/wikekadut.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/fofer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/adobe_illustrator_cs6_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/dagoregupefekebewuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/12881517520.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/97007695345.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/sosaradavekis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/cerebral_angiogram.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/vabim.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/49216738524.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/xugavasototuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7949/8918/files/bc_b_caste_list_in_ap.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_off000048cd.bin
c6c10807c095ebc05a2f481c67cac85ea610c1ceced731a8f63407120faa0a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48CD 5532 bytes
font_01_sfnt_off00005b7a.bin
cdc741c95587b9aa690555b5ff432d299a1ca7a848d3f2fdfedf08005dd7dcd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7A 10040 bytes

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