Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae0edf9b8023768…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 02:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba3fad4a12a3d1585bc75727bf44b83e SHA-1: f317a309cfc0adc500d04e30251b4c91a2fbd14c SHA-256: cae0edf9b8023768080c2e4fe8e9e86a95d1e6f00747c0549896be607daf5300
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=frozen+2019+sub+indo'. This URL is presented within the document body, likely as a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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.ru/wix?keyword=frozen+2019+sub+indo
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/ramubulijifokunepuboto.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/pokav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/windows_7_64_bit_activation_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/marriage_d_amour_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/62617718844.pdf
    • https://static.usrfiles.com/ugd/79e0dc_84f055078eee40b39ffa1c795b650df1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea853b393fef4fabb0aa58f16eb44639.pdf
    • https://static.usrfiles.com/ugd/70a38d_3bdc65aff7e147f3bcca82dbd89e4c76.pdf
    • https://static.usrfiles.com/ugd/c3548c_a4aad54641ca4afcb4916a3701312c45.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/24434911091.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/nezusupevinitakogaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/morurawasozadefomufunuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/chinese_translation_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/67855581624.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/livufidurusiwi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/lizodivusud.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/fovopudabatuxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4885/files/rimixepodidimovawojuke.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/boboriresakanave.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_off000068fc.bin
975f2efa609bdc12174b7f1b4978c1704906cc946e1d7efda810c524137484c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FC 5204 bytes
font_01_sfnt_off00007ab7.bin
e7b9d13e8ee5e91825784230faa505c4b52c308e2545473fd00ed3d5daf4b11a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB7 10060 bytes