Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28cf868b35233fc…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 10:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b917fce5f72c5a5f4aa56cce7bf5e220 SHA-1: 298b6c4027bf3f84da1dbcbb9b852e9b51240448 SHA-256: a28cf868b35233fc96bc5f32f81cea51c4faff7f03c0df1bb459fd2037e03ed2
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains the URL that triggers the malicious redirector. This suggests the document is designed to lead users to malicious content via a link farm. No scripts were extracted from this sample.

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=autofecundacion+en+plantas+pdf
    • http://files.shellystill.co.uk/uploads/1/3/1/8/131856306/petuwusenalogi.pdf
    • http://files.shadylanefarm.store/uploads/1/3/1/4/131437953/materef-raxawubilosabik.pdf
    • http://bonagoto.delhipsunderrajan.com/uploads/1/3/1/8/131871871/f3001cbbfc9ecba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/kimemofosok.pdf
    • https://cdn.shopify.com/s/files/1/0438/8323/3448/files/10113595062.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/57990975755.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/60125063833.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/wunelidosimupanol.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/vice_city_cheats_psp.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/tanuxotiposisisegoxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/voveguweganoli.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/46385503786.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/18076345661.pdf
    • https://cdn.shopify.com/s/files/1/0428/3315/0118/files/55337570614.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/23972439084.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/maredofoxogafufoze.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_off00006f2b.bin
a9dc2ace1717d7d95c809dcb468a6c89a96169400949ef9dece3d1c7a8d9e838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2B 5040 bytes
font_01_sfnt_off0000806b.bin
7edf974e51418c8ce06fe6faa40abe86bbc791384c67196ddc4d49c843bd5a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 11196 bytes

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