Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72c0fc6b54a0f99…

MALICIOUS

PDF

62.2 KB Created: 2020-08-22 17:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad68adfb8b94b7a492389996dc6736b SHA-1: 5544415eb3bdc2fca1b5969ca0ce3e9fcf6e8d5a SHA-256: f72c0fc6b54a0f9932e80b5f963be85d6d8d85e0de2d451533433f7bdd497313
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=assamese+old+audio+song, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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=assamese+old+audio+song
    • http://files.arsherbarium.com/uploads/1/3/0/8/130813364/7633226.pdf
    • http://files.abeemommy.com/uploads/1/3/1/8/131856664/e29c72393.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/b_d_chaurasia_general_anatomy_sixth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2594/7029/files/fetal_macrosomia_rcog_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/99625821860.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/jedigidunarujotiwupuled.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/bojiredowob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/nuvupiluxitowaruzutifikaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/jinirurirexovalisabosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/pelinozafipawevojiwibawip.pdf
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/18041007183.pdf
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/giwufizixuvimarovotox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/nazujibizotepefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/sabugagofiwezogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/internship_application_letter_sample.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_off0000a0a0.bin
ee0c5f1b0d7c78718f3d222919df1b0709f4c8a0dd13bfccfa207033c93c08cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A0 4840 bytes
font_01_sfnt_off0000b0ed.bin
825a0f8a6fb7fb39383aa589edc9c470c9d3fa87b78723420a1e650a85bc02e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0ED 14432 bytes
font_02_sfnt_off0000de03.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE03 4324 bytes