Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa308590d7d9f36…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 19:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15bf9d6272e352b326df24298746775 SHA-1: bbbf246f78f7482316608cfeb61aeb72dc34a124 SHA-256: eaa308590d7d9f36ba336db88e9ab8e4abc58873aae808d8685741534028bdca
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.cc', identified as a malicious redirector. This link is presented within the document body, suggesting a social engineering lure related to 'Veterans day cards template'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=veterans+day+cards+template
    • http://files.allsaintsarts.com/uploads/1/3/1/3/131383648/8116279.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/cancel_git_add.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2189/files/backless_lace_formal_dresses.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/35602225224.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/dibujarte_20_tomos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/ap_calculus_ab_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4334/files/coreldraw_file_to_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0452/2138/0247/files/borland_c_builder_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/cathflo_activase_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/bluehost_install_wordpress_manually.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/takorajetesanowujaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/40787184500.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_off000064f6.bin
507417927f658adb3e303c7be37209fd343e5864ceb632582207e170a66e4964
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 5284 bytes
font_01_sfnt_off000076dd.bin
cf5937a68c20d29971c19bf12900a83ef8d0379a80059f436a75a6bc374632f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 10348 bytes