Malicious PDF — malware analysis report

Static analysis result for SHA-256 4405d115f9ad65bb…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 10:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5ae51a0ea2e556a97c45d9489b9f83f SHA-1: cd8bb0809bbcc91ae68e199969511c33f2324af6 SHA-256: 4405d115f9ad65bba5101fd0c39b1f1f66a455f9667397c837efb60b8e2f694c
152 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This redirector is likely used to distribute malware, in this case, a lure for 'Acronis full crack'. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm for SEO poisoning or traffic generation. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=acronis+full+crack
    • http://vepuwujil.fatzdomino.com/uploads/1/3/1/4/131482992/21b082.pdf
    • http://wadewusal.moemoea-dreamspace.com/uploads/1/3/1/0/131070711/4672095.pdf
    • http://files.vsenergy.us/uploads/1/3/1/1/131164250/latikajosev_tovukidobidav.pdf
    • http://files.eyelightdesign.com.au/uploads/1/3/1/4/131453299/d7e70.pdf
    • http://faluzitul.pmmusp.com/uploads/1/3/0/7/130776394/6969172.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/nupokipesikanogaxapam.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/30525912749.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/funakepikelozino.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/biomassa_para_energia_cortez.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/duxerajojagoraxobewas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/povapopawodisanubagubomob.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/72_buick_skylark.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/mubewekuwijokasuwido.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/xipusovip.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/9287445884.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/pdf_to_word_nitro_crack.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://www.youtube.com/watch?v=OuFoGTDUclc
    • 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_off000062df.bin
b803cdd4d4e7f1fc3049fa2c1514df0cd1c692124ce4d5e6609f52726dd5371d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DF 4612 bytes
font_01_sfnt_off00007284.bin
5c489b16dde960ccc78847546af77b1ec687fbb26fbf58246fd7404d2798d363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 13344 bytes
font_02_sfnt_off00009cd2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD2 4324 bytes

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