Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3bca8e1deb49a8…

MALICIOUS

PDF

56.0 KB Created: 2020-07-08 17:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f6b5be8e3dde0147900e642d0ded798 SHA-1: 6e4bc47b5e021647f8d7d804e72dfc6160b80121 SHA-256: 8b3bca8e1deb49a8f18d273b5ae9b10ad283019aebc45fea9b4a4eb3c5d6b252
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body text, though partially corrupted, contains keywords related to 'recruitment notification' and the URL itself, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=crpf%20recruitment%202018-19%20notification%20pdf
    • http://files.nakedfranktheatre.com/uploads/1/3/0/8/130874458/ec4288f3eb.pdf
    • http://files.pawsforacauseinvitational.com/uploads/1/3/1/4/131438002/2076b15.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdf
    • http://files.mi-sheffield.com/uploads/1/3/1/6/131606368/niludavifek_rerodotite.pdf
    • http://files.flamentrealestate.com/uploads/1/3/2/6/132681281/kesirive.pdf
    • http://files.cornwallamillionactsofsanctuary.com/uploads/1/3/1/6/131606619/a19e9c.pdf
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdf
    • http://files.theladyjaneva.com/uploads/1/3/0/8/130873971/pepinepijesowel_mewonedogideg.pdf
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • https://womotisuxapo.files.wordpress.com/2020/06/naxagaguzipu.pdf
    • https://lubizup.files.wordpress.com/2020/06/65369412645.pdf
    • https://xupapinir.files.wordpress.com/2020/07/burugimovabemu.pdf
    • https://likoxodafan39484776.files.wordpress.com/2020/06/mabarebitinowag.pdf
    • https://zejefasa.files.wordpress.com/2020/06/kewibevoxajebotifibi.pdf
    • https://bebeleg.files.wordpress.com/2020/06/levelupomafore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007717.bin
85ad53c2265df77b7f96c3172315fd50cd2118fc13b81aba937927c2229d0471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7717 5704 bytes
font_01_sfnt_off00008a65.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A65 3720 bytes
font_02_sfnt_off000095c8.bin
7a35a9f91897913a00c846851a1ae1e706de2c3091de03424df1d318261e8bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C8 12192 bytes
font_03_sfnt_off0000bc61.bin
d9e18aee63f4bbf888a4f8276e7e0656be78ca2c4c0c628a171881fe352709e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC61 6092 bytes

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