Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f459d1b26272e4…

MALICIOUS

PDF

44.1 KB Created: 2020-09-12 06:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 760128df987519cd654a5ccf220b0788 SHA-1: eec9a1283e6d0841f3961fa7cd7d3c38e94d430f SHA-256: b1f459d1b26272e4a354f93d33ca204098ad02601b9780dd2eaed2328df8fe58
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, a common technique for SEO poisoning and redirecting users to malicious sites. The primary link directs to a known malicious redirector, which likely leads to further malicious content or malware. The document body, though heavily obfuscated, contains the initial redirect URL and other links that form the link farm.

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.link/wix?keyword=chiari+type+1+malformation+surgery
    • http://files.overthemoontransactions.com/uploads/1/3/0/8/130813965/9a4829.pdf
    • http://xefopu.charlenemosley.com/uploads/1/3/1/4/131438044/naxililer_remepavukuvate_jimigojovuke.pdf
    • http://files.ilovewatervalley.com/uploads/1/3/2/7/132741556/54c3b5.pdf
    • http://files.ihsanyanikoglu.com/uploads/1/3/2/7/132740580/8647147.pdf
    • https://cdn.shopify.com/s/files/1/0432/3501/6863/files/72915014710.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/bossa_nova_instrumental_songs_free.pdf
    • https://static.usrfiles.com/ugd/a382ee_171a154d191e4b6b8f67c1ce139ca13a.pdf
    • https://static.usrfiles.com/ugd/83d902_f8bd0325e21a405db73f25ae3e184ec9.pdf
    • https://static.usrfiles.com/ugd/2d1648_d970b2ce46ae47c3a2f5154ee65ffb1a.pdf
    • https://static.usrfiles.com/ugd/312e0e_e0e5fa45ddc84d28b144f1f03aac0b51.pdf
    • https://static.usrfiles.com/ugd/81ef4b_452df967d9e244d98c1cce9c6bd22302.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/90748354877.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/7296531740.pdf
    • https://cdn.shopify.com/s/files/1/0436/9216/3227/files/mavamukupok.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_off00006de5.bin
3d513aa04ad2a98cfe61a8ed4411291493c981bb3ef3bde5e967d49f00e07677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 5376 bytes
font_01_sfnt_off00008015.bin
398312231240bf1c5d3eb9f0fdcea19558535afd2bb73784b464f4e772812770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 10484 bytes

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