Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a7d96cf0cd794a…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 23:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0176ba8605a8a39e9760f21a9c7f5912 SHA-1: 1a4f9b98dbc8dfd691f5d6dae1f76621ca37f4fd SHA-256: f0a7d96cf0cd794a889dfa4f967797bc5551b0346ce50e2461e45f59f8dc0124
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large farm of external PDF links. The primary malicious URL identified is https://ttraff.cc/wix?keyword=annapurna+devi+archintunamma+song+do. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of numerous links to static.usrfiles.com, while individually benign, contributes to the overall link farm characteristic.

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/wix?keyword=annapurna+devi+archintunamma+song+do
    • https://static.usrfiles.com/ugd/b58d21_64671c166ea0442882276344d48d9efc.pdf
    • https://static.usrfiles.com/ugd/405339_86268e34eb69451f84bf90beb4264bcc.pdf
    • https://static.usrfiles.com/ugd/10e3af_08180bddb7a444fe99434048496a2451.pdf
    • https://static.usrfiles.com/ugd/de60da_7f1f63bf150147759fdb5c3dd60f2cf7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d76afc95570843bbb83e292015836584.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ab13af961bc4280b78ae6cec885a270.pdf
    • https://static.usrfiles.com/ugd/9c0842_90c606bb9bc040109e049f258f0c18f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5d4a7022c8449feb37ebda458bdbc95.pdf
    • https://static.usrfiles.com/ugd/b8c837_6acb33dfd6d14b85b2497a9b82772c46.pdf
    • https://static.usrfiles.com/ugd/b8c837_935f39ae9fc64dfdafd45904ef9bd08c.pdf
    • https://static.usrfiles.com/ugd/82e28d_e26f776ed1a441fd900b21a1836fbd13.pdf
    • https://static.usrfiles.com/ugd/b8c837_89144cee0e56416bb73b154dfc3b7f77.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_off00005257.bin
07553dee5e77a769790193dbaf85853139ab1e403b21e8858072b9844ff2ec9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5257 5504 bytes
font_01_sfnt_off000064e7.bin
3ea4a35e6ad00ba26d780df32034d6960f7427783cfbbfad5c2e20a6bc0f21af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 13024 bytes

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