Malicious PDF — malware analysis report

Static analysis result for SHA-256 b022986065f2aa08…

MALICIOUS

PDF

34.0 KB Created: 2020-07-08 23:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaef689906f717e7cf6ed88b99c744ef SHA-1: 7ee28301a4935a43d7ca68631fd1fd0266d53748 SHA-256: b022986065f2aa08b98db7afaac1b1458054f765a0b8db91623c24dfe8ac664b
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to redirect users to malicious content, masquerading as search results for a specific book title. The primary redirector URL is https://ttraff.cc/wb?keyword=the%20giving%20tree%20pdf%20download%20with%20pictures. This technique is commonly used to distribute malware or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=the%20giving%20tree%20pdf%20download%20with%20pictures
    • http://files.heatherraywriting.com/uploads/1/3/2/8/132814967/6520a6869.pdf
    • http://files.yuniverse.ca/uploads/1/3/0/7/130739895/3623ef.pdf
    • http://files.avsevents.co.uk/uploads/1/3/1/4/131454272/4008982.pdf
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdf
    • http://files.sparklyoils.com/uploads/1/3/1/6/131637325/3072304.pdf
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdf
    • http://files.mhecblacon.com/uploads/1/3/1/4/131437351/vasak.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • https://sapofavef.files.wordpress.com/2020/07/97781941386.pdf
    • https://wopigumu.files.wordpress.com/2020/06/78184858953.pdf
    • https://zegivebef.files.wordpress.com/2020/07/sifumodotimefu.pdf
    • https://xitesino.files.wordpress.com/2020/06/kemitizidavoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.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_off000047d7.bin
38d418ee351cf8626c2783b129d2d9f7fa93662a9693051c055ddbe6ff9d8800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47D7 5400 bytes
font_01_sfnt_off00005a3d.bin
4a535f1edaed4c9b85e242347aa762838c8783e4d6b066f9d162e94200756b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3D 9412 bytes

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