Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfdb606c5716f27…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 04:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8931551b5426f09ab30c391d4020a97c SHA-1: 53f3af01172252753f22cd906838b2dadc51ec0d SHA-256: bcfdb606c5716f27b19c28ec80ef0a034f205fd4b86ff15eb4b13489e651e73c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.ru/wix?keyword=older+download+mp3, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to download-related keywords and the malicious URL, suggesting a lure for users to click through to malicious content. No scripts were extracted from this sample.

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.ru/wix?keyword=older+download+mp3
    • https://cdn.shopify.com/s/files/1/0459/9601/5773/files/dj_remix_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/lannister_theme_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/30525912749.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/72101330614.pdf
    • https://cdn.shopify.com/s/files/1/0461/9862/0323/files/galveston_fishing_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9527/files/ripanafuzesave.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/vubalazel.pdf
    • https://static.usrfiles.com/ugd/913720_91436707fd4c407c80ee9507ca663f8b.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_2c6a5620bef241529b0298c46d04ad79.pdf
    • https://static.usrfiles.com/ugd/b8c837_439ca287ba404a629e4fd1e99a16ca19.pdf
    • https://static.usrfiles.com/ugd/ac72e0_979c668471b94f1cb9f3667ccd193f21.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_4087146ff92d46fa8036103dbd3800c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9a26b5d64ce4b4c8742c2ff5ad0fe0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_350d0a29eb0c4a69bdebba7ef5a12e24.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_off00007010.bin
c247d8127c2cfb684bf2592f2e290801de0a318e4b57fef814d0599d0cacbeed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7010 5212 bytes
font_01_sfnt_off000081be.bin
99c24647045c4499085b7010603743a625daef5258091b424130a6509145adf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BE 10236 bytes

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