Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4a0da3416fe144…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 21:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaa63dbd849ca0575200819d1e1876ea SHA-1: 02d9f2ee8e1bd7ddc64f82d0fbcc18ff4e132954 SHA-256: ed4a0da3416fe144ab16fab10058a3298a8bf7fb5ef5398f7eb592b80be6d0c1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=free++english+tagalog+dictionary+install', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=free++english+tagalog+dictionary+install
    • http://files.omahaflooringpros.com/uploads/1/3/2/6/132681482/8428937.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4065/files/65241524024.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/gigibolura.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/materiales_metalicos_en_la_construccion.pdf
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/vtech_cs6124_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/bevezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/dunemamusisuvigare.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/radefa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/xelexix.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6463/files/voresupira.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/apocalypse_magic_of_skyrim.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/lamixiwofisadulolirizira.pdf
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/calicivirus_treatment.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fe3.bin
db96d9a6fe9d7343b9ad17903107924b3df43503fa2aba9bcc4b130093584459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE3 5044 bytes
font_01_sfnt_off000060ff.bin
7b021354e9d1bc91944f9de401cc8a6a6f4a1a7843f335df108fe426274e0ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 10396 bytes
font_02_sfnt_off000083c7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C7 4324 bytes

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