Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6612750cfeb4c8c…

MALICIOUS

PDF

40.9 KB Created: 2020-09-19 04:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c4584a427754398e66393ea1133ce0b SHA-1: 6f07f2099b596ddfbfe167c2e34b7b7030d43a02 SHA-256: a6612750cfeb4c8cb3d057db749497f3dc17df9bc177875f2fa57c9d23b71b76
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=does+quickbooks+have+an+income+statement'. This URL is presented within the document body, disguised as a search result. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign Shopify domains but are likely used to obscure the malicious redirector. The 'SE_INVOICE_LURE' heuristic further suggests a deceptive intent, likely to trick the user into clicking the malicious link under the guise of an invoice or financial document.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=does+quickbooks+have+an+income+statement
    • https://2039082c-551e-4f40-b720-6b7d575e72ba.filesusr.com/ugd/a6e5e9_2c9c395576b5444c8067b59071226af0.pdf?index=true
    • https://11ff1713-e3f3-464a-b765-0cc9a30cb665.filesusr.com/ugd/3c2969_c394feab753e4743a708cf622b2dbda1.pdf?index=true
    • https://1189e396-f370-43e7-bef6-ec0c3010ba29.filesusr.com/ugd/3bf302_134f8385506b4b46a4a4e8e0ced84501.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0461/8141/7114/files/printable_weekly_planner_template_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/57411285725.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/candombl_de_angola_rezas.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/86305520282.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2523/files/91524360664.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/windows_7_ultimate_activator_crack.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/coquette_regular_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/read_books_online_free_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/21432534925.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/rational_numbers_class_8_ncert.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_off000061f5.bin
1dc297714959f7b3ada92b401cad546543a8c0a4b8834300f9db0da1a3d6fa84
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 5300 bytes
font_01_sfnt_off000073f4.bin
8996e2ea54039a6d4fcd4517326d914afed354f5e26fa715a3145d1b08c337a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 10164 bytes