Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de43280dc34c1f1…

MALICIOUS

PDF

58.2 KB Created: 2020-08-30 16:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3517edf8d0019d16725ef0065989532 SHA-1: 4c5c828aff7216f38e375b43ca0c98b603cf7f42 SHA-256: 1de43280dc34c1f1496545b4de95505e2877d2f1bcd12a63db327228f6610be4
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector. The document body contains the same URL, suggesting it is the primary lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL confirm this malicious intent. The file also contains a large number of embedded links, as indicated by the PDF_SEO_LINK_FARM heuristic, which are likely part of a link farm to improve search engine ranking for malicious content.

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=imagine+dragons+smoke+and+mirrors+do
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23582012054.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6936/files/storybook_html_page.pdf
    • https://cdn.shopify.com/s/files/1/0438/2805/2130/files/guridegom.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/how_to_clear_a_discord_chat.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/tesuxezuburatixezeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6065/files/how_to_improve_your_vocabulary_in_30_days_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3406/files/bosch_anti_lock_braking_system.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/lightest_reader_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/the_asian_financial_crisis_causes_cures_and_systemic_implications.pdf
    • https://cdn.shopify.com/s/files/1/0439/2566/7995/files/gungeon_book_of_chest_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/relijawagovokinadepup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/php_multiple_file_uploader.pdf
    • https://static.usrfiles.com/ugd/de60da_69bca9fc7f7547af93f99b69b4108a7d.pdf
    • https://static.usrfiles.com/ugd/7f16bd_dfcafaff6cf74f85877f400e79d77c2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae1002feafd14e38a9b8b3d76a79c158.pdf
    • https://static.usrfiles.com/ugd/7041e4_ce19fb8c993542ada7da246ac5204c84.pdf
    • https://static.usrfiles.com/ugd/3e87bf_52ea1fbdc94e42e58eef914340a563d5.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_off0000a647.bin
640653d1be7de72c8a53bda8fd555c08b3dacdd0825c84f2ce57a586afd1c1db
pdf-font-stream PDF embedded font (sfnt) at offset 0xA647 5112 bytes
font_01_sfnt_off0000b78c.bin
1c686ee9b27cce06f1c286e4a473a3aee9ceae5f8f05b6b2b8898df7b3b22662
pdf-font-stream PDF embedded font (sfnt) at offset 0xB78C 10624 bytes