Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b4c32676025010…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 21:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c095fa7b9e1db09da1fcd3f2379ece45 SHA-1: a198be57dc223ac65a40e48408af51df22f67c92 SHA-256: a2b4c32676025010b04517523f6a117202683fe870814b3485124ab9499ef9a4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=end+credits+order'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0457/5831/6700/files/dental_trauma_guide_primary_teeth.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a lure to a malicious site.

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=end+credits+order
    • https://cdn.shopify.com/s/files/1/0457/5831/6700/files/dental_trauma_guide_primary_teeth.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/95382834793.pdf
    • https://cdn.shopify.com/s/files/1/0438/8120/1819/files/42950593180.pdf
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/schindler_s_list_theme_piano_violin.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/cost_accounting_theory_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/5373503240.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/behringer_c-_1u_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/bluestacks_apk_ykleme_hatas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/sufivevuzamul.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.pdf
    • https://static.usrfiles.com/ugd/0c268c_065a2ce186904895be760eb6ce0f3a04.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bfbce9e99b9418aa57e31d4dbabc5c6.pdf
    • https://cdn.shopify.com/s/files/1/0445/4485/2127/files/oceanography_and_marine_biology_an_annual_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/bokugeganefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/wixovibisofidig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4673/files/android_adb_shell_error_device_offline.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_off00006ada.bin
45f045949831fe5b15eaf1a79c4069819b2c3fed7bfaae6c5f17d5537710d473
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADA 4648 bytes
font_01_sfnt_off00007aaf.bin
f65bc050e5747f3809601a960d1091d81d2e9477f322f0d62507d46278a7268a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAF 10376 bytes