Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da12a55fa609360…

MALICIOUS

PDF

49.8 KB Created: 2020-08-29 00:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e3f8e7ce11796e8a350dc0a12bd7fec SHA-1: 7f608906017b7bce3c0c50b073f62d041c314a3c SHA-256: 4da12a55fa6093602cf478a0c485b3093f5f7f452f3201177a63d983596402c6
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, many pointing to benign content, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/wix?keyword=lista+de+verbos+regulares+en+ingles+presente+y+pasado', which is flagged as malicious. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. 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.cc/wix?keyword=lista+de+verbos+regulares+en+ingles+presente+y+pasado
    • https://static.usrfiles.com/ugd/b8c837_d25bd7c384f64513b634e0770dba64ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc58c533a3854ec8a080083273e8b5db.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b405fb8ba84b7eadd8756f7b612aad.pdf
    • https://static.usrfiles.com/ugd/b8c837_5838c8f1798b4f7faba07b119040f1ba.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/66477934092.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/visita_iglesia_prayer_guide_tagalog_printable.pdf
    • https://cdn.shopify.com/s/files/1/0464/5286/7240/files/how_to_make_your_own_vr_headset.pdf
    • https://cdn.shopify.com/s/files/1/0466/8964/8804/files/wire_transfer_suntrust.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2921/files/50145388557.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/gopepesegape.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/80691457327.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/serevobavi.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_off0000751e.bin
09cb33188ef7cfe06147db23a5ddcb10583263846f48e9029e002fa9722534a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 5372 bytes
font_01_sfnt_off0000876f.bin
eaae38ea4006a97016625ec5d27997f58ecb10dc60d11b8aec60333a98cdb8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876F 16392 bytes

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