Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be2e9dc333a96b7…

MALICIOUS

PDF

48.9 KB Created: 2020-08-31 01:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c3fe6e4dc0152f5c9a86d964f02d53 SHA-1: 8f5b069cfa24e48e5c47c47ceb43f969008d228d SHA-256: 1be2e9dc333a96b7d3bf0e456e3b216637cf44516587aafe141b7981d561fd0c
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, a technique often used to direct users to malicious websites. One of the primary links, 'https://ttraff.cc/wix?keyword=graphlab+python+3', is identified as a malicious redirector. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but does not provide clear textual lures. The presence of numerous shopify and static.usrfiles.com links, while many are benign, contributes to the overall link farm characteristic.

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/wix?keyword=graphlab+python+3
    • https://cdn.shopify.com/s/files/1/0436/6522/7929/files/binaural_music_for_studying.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/71055834460.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/libunub.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/robobosawa.pdf
    • https://static.usrfiles.com/ugd/63022f_7bac701f3a6f49f99e192ba25e3a0f50.pdf
    • https://static.usrfiles.com/ugd/3e87bf_d65851ba17a14c3fb3ee4d98fd29c00a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2baf3123d5914fa188f56659c9d14a21.pdf
    • https://static.usrfiles.com/ugd/5e81b9_0c5d54d66f8d4c0a9f2df773ad06b5c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f7a7240fc547119f6dc051bed9310f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7df349b8dad545d58ed9b50e11a55cc5.pdf
    • https://static.usrfiles.com/ugd/edb4a7_65494f0d891243ba84327db6cb105d0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_14adb31cc52b42c2910f88d46b30196b.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/farmville_2_country_escape_prized_animals_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/menim.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/27649417006.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/jovaboduxovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/complete_niv_bible_free_download.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_off000081d4.bin
755758d70791b402de1540dec6dc17e8162f173bf976480ef648b62bf5d363f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x81D4 5168 bytes
font_01_sfnt_off00009368.bin
612b777ce055bd6dc8dd981ca6bc6df42953d847d2f1608840d90fa1a8a835ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x9368 10404 bytes