Malicious PDF — malware analysis report

Static analysis result for SHA-256 f094c4db5d48dfc0…

MALICIOUS

PDF

44.4 KB Created: 2020-08-23 16:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 883f1db88294ed99a5957729596a5e65 SHA-1: 3ed0495d968aac1690a8e45f0cc4bfacdf37428f SHA-256: f094c4db5d48dfc08055b29400b656b4eb0b0d5c1e3449cceac45873c7fbf6a0
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'agricultural research paper pdf' and includes the malicious URL. This suggests a phishing attempt to redirect users to malicious infrastructure under the guise of providing a research paper.

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=agricultural+research+paper+pdf
    • http://files.tfccgroupltd.co.uk/uploads/1/3/0/8/130814858/1759621.pdf
    • http://napas.flyajetsim.com/uploads/1/3/0/9/130969690/sagivi.pdf
    • http://tajikoxe.spcottermusic.com/uploads/1/3/0/8/130813834/5540684.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/jimmy_choo_new_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/migile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/62192942626.pdf
    • https://cdn.shopify.com/s/files/1/0451/9287/2087/files/keworanokuwarewexatu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1736/files/factoring_quadratic_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/0850/6531/files/71571509771.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/git_specify_ssh_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/identifying_character_traits_worksheet.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_off00006426.bin
31b0b5ba29c1803f07db71b7f3d3bc69f77ec7ff19d533ab6d7fde018edd6532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 5072 bytes
font_01_sfnt_off0000757b.bin
464323868079c21c50c9729d01cbc98d7e5da81bfb4078ccfb21e551b8c61ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 9824 bytes
font_02_sfnt_off00009726.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9726 4324 bytes

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