Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9ca2abe58e64cf…

MALICIOUS

PDF

50.2 KB Created: 2020-09-07 09:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98be98d10ba1bc7e70aed350d0f21055 SHA-1: d7c2706bc40748cf254a4e28e0fbf382e7d815d9 SHA-256: bb9ca2abe58e64cfc34657eb0acfdfa66aa100d75cf207b15527f1b63b78b773
150 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 that appears to be a lure related to 'Android apps tutorial bangla pdf'. The presence of a malicious redirector URL suggests an attempt to lead the user to a compromised or malicious site. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=android+apps+tutorial+bangla+pdf
    • https://static.usrfiles.com/ugd/7d21c0_70131dcf50b040d5973a6274827b99b1.pdf
    • https://static.usrfiles.com/ugd/7e6083_3d62990859754b0e9a7618b2cc2c3177.pdf
    • https://static.usrfiles.com/ugd/941881_5d5c9a24171b4a53a5596c8fa1b10a60.pdf
    • https://static.usrfiles.com/ugd/bfd504_3197ab72c6aa414ca1b14ccd7fe4576c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d68b757b6564f6597666d79b09c24aa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/libro_barrio_bravo.pdf
    • https://static.usrfiles.com/ugd/e6092c_5b40e5ca63274e7ea12149d3a362b3b7.pdf
    • https://static.usrfiles.com/ugd/66c878_065b65b342824ab69c6f0f37c78d2ee9.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25af426ad04839a74d89c065067bb3.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_241524680976492395a704c7a7dd608e.pdf
    • https://static.usrfiles.com/ugd/59deca_ff0ee65966044523ae8620897d997e3b.pdf
    • https://static.usrfiles.com/ugd/760a88_7c5d7265cd104833ac094c4959c89f84.pdf
    • https://static.usrfiles.com/ugd/80bfa9_5189dcbaf1f34211be6cef136934829d.pdf
    • https://static.usrfiles.com/ugd/64e449_290847ff712c444b9e3d48de7a014b3d.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_1678021feb3b45f4a83954202dc65cb5.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d55.bin
3b491a5b90d246941e15cbd5cf4fd756249acf69c04bed1ccc26dc3694c29753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D55 5336 bytes
font_01_sfnt_off00005f82.bin
a210ccffe4030ce3d830d2a04634154bed453913aa98f7a954042065074dcc60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F82 8068 bytes
font_02_sfnt_off000078e1.bin
026d61874660331c2bbd2ebfe236d46be43f27f97924924607a11fa4de6ff02e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 13360 bytes
font_03_sfnt_off0000a3c5.bin
f9d08f2da3ff27ac3a0101f7a82621f45736b018eb9d19c9ef42e60bc03b8470		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C5 16336 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.