Malicious PDF — malware analysis report

Static analysis result for SHA-256 d966bf9fccc99118…

MALICIOUS

PDF

34.9 KB Created: 2020-08-02 21:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6f269e35323e09b2bb6349682a4b7f0 SHA-1: 2d94768e593767c5bd89526dd08222654eddbb5d SHA-256: d966bf9fccc991188fb05d1d6f621540553c6d3063020a24e3bb3d2cd30a36ea
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=webmail+tamhsc+edu'. Another critical heuristic indicates a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0440/0077/2246/files/bamaxak.pdf' being the first identified link. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's purpose is to trick the user into downloading a password-protected archive, likely to bypass gateway security.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=webmail+tamhsc+edu
    • http://files.chest-messages.com/uploads/1/3/1/8/131857284/7831597.pdf
    • http://files.kissmeforeverweddings.com/uploads/1/3/0/7/130775633/molevaj-mezizex-moxesew-xupomezefaz.pdf
    • http://files.english.coach-michael.com/uploads/1/3/0/8/130814716/3538304.pdf
    • http://files.madewithloverldesigns.com/uploads/1/3/0/7/130739517/sinarosum_sezipajuzox_kimekazitubus.pdf
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/bamaxak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/72389023117.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8599/files/lakesesetudiwakul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/rogawski_calculus_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7909/files/54046338281.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/alcoholics_anonymous_big_book_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/kekuperukolipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/ponapavamaxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/adamant_dragon_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1319/files/genozipedenobikagolet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/southwest_check_in_script.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_off00004bff.bin
3b7caa027df35bb831989af60c9ef7ec0a7a5bab93a105cc94ab8bcc17d9bdf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFF 5236 bytes
font_01_sfnt_off00005daa.bin
1cb24b803b63e01def8f933e52b5b6f552c65d0cce61ecec8922cb56887a4ef1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAA 9752 bytes