Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0da84829653e9f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 10:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a758c75d166a21c199942efe42d9e737 SHA-1: 94652c3c22c06ad4472f190bb5ae8c7423a03ccd SHA-256: ee0da84829653e9fa83b22c956e5a669cfd58ec8a662c1592fb3541b504e273f
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.ru/pify?keyword=building+management+system+design+pdf'. Another critical heuristic identified a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0430/6118/2617/files/bosux.pdf' being the first listed. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to a malicious site.

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=building+management+system+design+pdf
    • http://files.metamoralionsclub.org/uploads/1/3/0/8/130874148/d5fb57cbdd16.pdf
    • http://buxusem.shishonsports.com/uploads/1/3/1/4/131454012/wudunawozil.pdf
    • http://files.paradisekennelnb.ca/uploads/1/3/0/7/130776246/bufeveweponuluvi.pdf
    • http://tigakege.humancapitalrealisation.com/uploads/1/3/2/6/132681670/a17b92.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/bosux.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/wevadafukujazitesuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/xutuzoperoxofofenub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/namevigawixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/gobirotev.pdf
    • https://cdn.shopify.com/s/files/1/0438/6743/9264/files/jurumamidexaganise.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/vinusukutekipufudapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/sipowojopatitijurevaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/lagonidaloledadedezizo.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_off000066cb.bin
0a73aa21d5acf546cc4b8cf30cb1e71313c71843c9c7959ce268afaaa4f9bad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 5416 bytes
font_01_sfnt_off00007937.bin
ebeab0d920374fd9a7a14a855039b104146bbcc3fdfcce103cb4b40272b5b5f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7937 10144 bytes

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