Malicious PDF — malware analysis report

Static analysis result for SHA-256 df895a6eb886501b…

MALICIOUS

PDF

48.6 KB Created: 2020-08-30 19:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a5f335bf4d8058f59ba9bfc3a9e0cf SHA-1: 7e836ba695cd545402b55ca3198f4f6849df23c0 SHA-256: df895a6eb886501b805dcb0fb497e959397245b5f4b21c76b226c8a83b3ff6ce
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to a known malicious redirector at ttraff.com. The document body contains obfuscated text and a URL pointing to a potentially malicious redirector, which is likely intended to deliver a second-stage payload or lead to a phishing site. The presence of numerous other PDF links, some benign and some potentially malicious, suggests a link farm or distribution mechanism.

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.com/wix?keyword=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+havij+1.16+pro+%25D0%25B1%25D0%25B5%25D0%25B7+%25D0%25B2%25D0%25B8%25D1%2580%25D1%2583%25D1%2581%25D0%25BE%25D0%25B2
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/23198614563.pdf
    • https://cdn.shopify.com/s/files/1/0448/3337/4369/files/mendelssohn_piano_trio_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/bulopapido.pdf
    • https://cdn.shopify.com/s/files/1/0428/4612/6247/files/ccrc_annual_report_and_accounts.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/58114271161.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4561c2183f94120b0ed500ba06b6d3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_790f5b5790084de09fb769b98c727ceb.pdf
    • https://static.usrfiles.com/ugd/1decf9_1b519acd282e4b639a567bcad8253f6a.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/49391860338.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/fojegixumere.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/try_this_pegboard_nerds.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8150/files/xodisobojasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/google_account_manager_login_apk.pdf
    • https://static.usrfiles.com/ugd/b8c837_52f3afe6cc2a4343b50c8456402e07f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c67ac548abd5477f94ec77f1fc2067fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4bf6b409ea74fed8cf0887e40321912.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_off000069d3.bin
d99d0bba0b944ce5e852873cb730fd6344d6cf5b346618a32e6250f3b519e7d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 6744 bytes
font_01_sfnt_off00007f08.bin
11390b3e602112a8804fab20a3091ba77b2e060ac4ac6b2e85c2969e8e167a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 17040 bytes