Malicious PDF — malware analysis report

Static analysis result for SHA-256 21819847afaec133…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 08:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79f490f7b9faac0b3801b5b262575fc9 SHA-1: f619ce970ebfc4e8c3bd5825ab672ba696b12e56 SHA-256: 21819847afaec1334cb49d85b7fb49b9badb2b6c4b33f06193c6da63b6b7f1a7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.com/wix?keyword=nanda+nic+noc+kerusakan+integritas+k', points to known malicious redirector infrastructure. The document body itself is heavily obfuscated and appears to be junk data, further supporting the malicious intent of the embedded links.

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.com/wix?keyword=nanda+nic+noc+kerusakan+integritas+k
    • https://static.usrfiles.com/ugd/b8c837_475ea5f403834e1c956264d8c682346e.pdf
    • https://static.usrfiles.com/ugd/b8c837_040c7584a9a24ecc9a3cd31e372d9080.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e14e57d5b084f45bf420dce094d6a1d.pdf
    • https://static.usrfiles.com/ugd/99965f_c1a4cea232384e80a354455b4379562d.pdf
    • https://static.usrfiles.com/ugd/b4a829_29f34b571db546798cf7ac30dd476fb1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/arthritis_uk_knee_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/70842940763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0242/0644/files/65657614856.pdf
    • https://static.usrfiles.com/ugd/9b5f63_a801d976472f4d539ca02549a115ab71.pdf
    • https://static.usrfiles.com/ugd/b8c837_0855aecdad9f4b0aa0a1147d93c609aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0f772c3b4b14dcb99e4c7c730263c97.pdf
    • https://static.usrfiles.com/ugd/b8c837_b10f1ca66d2d46b0a9a5e89f3e9c9169.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ad9e121e30941b399d137c18de57ba9.pdf
    • https://static.usrfiles.com/ugd/72b0e7_2034195d48bb4642a65c882099be5828.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_off00005e52.bin
60d447feb22c941b0ef019bbc3b0d837257a3cc6eda7f95e6fcab1582fc7d8e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5108 bytes
font_01_sfnt_off00006fb9.bin
3db0d8e5e7f5a937a718a4e43c302be708a69aaf6c974d8b90af0ed2f1d7025d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB9 10284 bytes

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