Malicious PDF — malware analysis report

Static analysis result for SHA-256 51119e1c61d9e483…

MALICIOUS

PDF

37.2 KB Created: 2020-08-30 19:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf919182a3840dd51d10e301df1de7c SHA-1: d57b12e2507b8f9b0e43bc89846e894f9f2576e5 SHA-256: 51119e1c61d9e4833b303a965d51a85971fa987b3fc6ef9bde51961f4b71866e
128 Risk Score

Malware Insights

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

The PDF file contains a prominent link that redirects to a malicious URL, masquerading as a download for 'dj mustard perfect 10 zip download'. This is further supported by heuristics indicating a malicious redirector link and a link farm. The presence of a visual download button lure reinforces the social engineering aspect of this attack. The document body, though partially corrupted, contains the malicious URL and references to other benign-looking PDF files, likely part of the link farm.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=dj+mustard+perfect+10+zip+download
    • https://static.usrfiles.com/ugd/b8c837_6184eb3acc454c0e9bcb142be6dd3251.pdf
    • https://static.usrfiles.com/ugd/b8c837_653b4965d3fb433f8d4c65a45cf23aa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e410d01fb5eb4f5bae7a3678bc2012ba.pdf
    • https://static.usrfiles.com/ugd/5360f8_f4450eca0eba49349460c40c2ff39e26.pdf
    • https://static.usrfiles.com/ugd/b8c837_96ad637ede0f401fb2f0e59d16a6e310.pdf
    • https://static.usrfiles.com/ugd/b5aed9_b78b623a4e504d748cc7343948d70710.pdf
    • https://static.usrfiles.com/ugd/6290de_01278964cb3b4f1a83d5ba64a990dc34.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e4b7dc14fdd4908b093f5951b182647.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0f6d74d10bc47bdb90ccbb503061549.pdf
    • https://static.usrfiles.com/ugd/8b49c6_60a408e678f743098a60d974e09d1767.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/banubimudasorar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1905/0908/files/59122610751.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_off0000513f.bin
28b7f197a27be2a080959ea74bc3c7ca78a2045e318d6a6dd7f9c6f6ad079754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x513F 5712 bytes
font_01_sfnt_off000064be.bin
d8163951c7637088113c5ca8ebeb51688656d12536bf2f5c583edb82b163244d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BE 10360 bytes

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