Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f56e4213ed1320…

MALICIOUS

PDF

41.1 KB Created: 2020-09-23 19:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0079d03c78c29c1196fa330fba993e86 SHA-1: 84cc44f13705a05668ea2c5876ae54dbf09121d1 SHA-256: 24f56e4213ed1320108be61f3f029defca2e1b54c378d4697969cacef826af89
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a book analysis, which is a common social engineering tactic. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports malicious intent. The document body itself is heavily obfuscated but contains the primary malicious URL.

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=through+the+tunnel+by+doris+lessing+analysis
    • http://surekiriz.alwaysgetbetterstronger.com/uploads/1/3/1/6/131636960/kusolarudirosi-ralokewosuvuman-labug-pewixuviwegoge.pdf
    • http://ruwakumiw.goldenrootgardening.com/uploads/1/3/0/8/130873982/sutesodiw.pdf
    • http://files.beehivealchemy.com/uploads/1/3/0/9/130969659/e15b8a6.pdf
    • http://files.zoomkidspalakkad.com/uploads/1/3/1/4/131438557/nidisitefuwajetob.pdf
    • http://goxokul.joyhakim.com/uploads/1/3/0/7/130775350/b9a59a3.pdf
    • http://rutavug.sturgeonriveroutfitters.com/uploads/1/3/1/0/131070450/c9b3947ba37.pdf
    • https://5832545d-da23-4e1c-a942-24e479aca41b.filesusr.com/ugd/097bd5_b92e5f14ab414e938c2d77813714bce1.pdf?index=true
    • https://4f0a3e1a-18e5-4a36-b053-26617cc79d75.filesusr.com/ugd/e2a635_7c1d027b96f54c5b8fab1d20216ea109.pdf?index=true
    • https://1d0a3d22-b04e-4e9b-8361-f5d501e685c1.filesusr.com/ugd/9421c8_685d611364fa44adb953d2316d08c5cd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/sbi_bank_po_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/0880/9384/files/32640876520.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/fipawotavufiveziza.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/milelemobejuzawag.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_off000064cc.bin
636fe6356b056e02c951b0178fddefd19de55d38c0bc5d6b6867bc6ec1ff33a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 5276 bytes
font_01_sfnt_off000076b8.bin
267598f7f8954a4de595bb8ff12e8bce3cadf8169558baae32c4b5dc3abb0436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B8 9612 bytes

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