Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48276f0fc8e27ba…

MALICIOUS

PDF

58.6 KB Created: 2020-08-04 01:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344a204ec1795ff8eb3daa0376b35faf SHA-1: a713736b95950be9b5b5b4d982f0e646f81db35d SHA-256: e48276f0fc8e27ba170d12b15476900be9ad30772903db00f099f7a9901aae9e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=manual+de+apicultura+moderna+pdf', is designed to lure users into clicking it under the guise of a beekeeping manual. The PDF also contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=manual+de+apicultura+moderna+pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://files.iomcmborotn.com/uploads/1/3/1/0/131069887/keguginujobosor_tumemudut_gakizevu_tuzukatef.pdf
    • http://files.bhassociatesinc.com/uploads/1/3/0/7/130776368/tokavixarige_zimuralefewefe_bitogodar_funabomo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/mopamufakoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/prepositions_of_place_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/69734029733.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/wokutofexowanerodumedad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/remove_files_from_git_add.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/18173193596.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/13162111581.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/83938003013.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/jasarowopezifujewojuzale.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/xegonapikadar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/kidumifa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/wulawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/maniwobemu.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_off00009a13.bin
9de842cf426a328a19bd99b51f097bbf7718f84277cf749496cbc188e360861e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A13 5008 bytes
font_01_sfnt_off0000aafe.bin
409410140785e60a8f542b27daca4ac6f5ee7ee7a47ab3b50fdc235b82b298b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAFE 10624 bytes
font_02_sfnt_off0000cf4e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4E 4324 bytes

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