Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bdd0328647d226…

MALICIOUS

PDF

35.4 KB Created: 2020-08-12 04:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ec23d0c3b80e5064c0aa8dec8782478 SHA-1: ca458a01d6c6399be4cc12d9f7ed365489371d7b SHA-256: f0bdd0328647d22657236b1be99a1be474f2ecca3e37765a0bf9eaab677f7592
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, masquerading as a "positive economics textbook pdf", with the primary link pointing to a known malicious redirector. The document body itself contains obfuscated text and the malicious URL, suggesting it is designed to trick users into clicking through to a potentially harmful site. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attempt to drive traffic to malicious infrastructure.

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/wb?keyword=positive%20economics%20textbook%20pdf
    • http://files.nutmeg-labradoodles.com/uploads/1/3/1/6/131636941/sisipoj_xemami.pdf
    • http://files.thinkerslodgehistories.com/uploads/1/3/0/7/130738566/wobijibajefun_dotor_tonirufojutejiz_daxik.pdf
    • http://files.theloosethreadsquilters.org/uploads/1/3/1/4/131452997/sumikul.pdf
    • http://kejedubug.stoddardcountyhistory.com/uploads/1/3/1/6/131606407/budolefobagunige.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/us_2015_holidays.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/rekulam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/84868349271.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/econometrics_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/nogemonox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/sugawerokog.pdf
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/speed_test_grandecom.pdf
    • https://cdn.shopify.com/s/files/1/0437/4836/0343/files/rsvce_bible.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/ms_word_to_converter_free_download_full_version_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/nufika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.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_off00004bd6.bin
5d4a88935de96edd7224ba463116e87e20572b1622670216d2bdc18df0be4208
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD6 5296 bytes
font_01_sfnt_off00005dd8.bin
ca22574840d95aa89d3fe3b8c17c762c927d7e4b3854867e573a55e09c88ec68
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 10240 bytes