Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac762b5e4c241a5…

MALICIOUS

PDF

48.9 KB Created: 2020-08-30 01:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e478291e75c66f1160e13f872b1fdbec SHA-1: b0616cf2ad497710d756e7fcea19ee7040f30314 SHA-256: 7ac762b5e4c241a52cfc9ca2ec53081a5e2921f5ec754ea74981691712f6378f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a primary link to 'ttraff.com' flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to financial institutions and the primary malicious URL, suggesting a phishing or redirection attempt. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.com/wix?keyword=cenlar+fs+princeton
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/65777674556.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/archery_master_3d_hack_version_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/vifevonolekajotunulazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/aadhar_card_form_download_file.pdf
    • https://static.usrfiles.com/ugd/b8c837_413166dd6e904ee78e3076911b2f31fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
    • https://static.usrfiles.com/ugd/902d29_db7a56a31cb74a1d8d95b612db92bb56.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fa6dc405ed3443ebdf37def48f500db.pdf
    • https://static.usrfiles.com/ugd/0dd040_670efb0b001c4b669bd72c169eb0f1b0.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/xikozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/zoroxukugomeremimekovalom.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/simple_chat_application_in_android_github.pdf
    • https://cdn.shopify.com/s/files/1/0451/3595/4074/files/welding_of_aluminium_alloys.pdf
    • https://static.usrfiles.com/ugd/10e3af_7c7cf59187d142f1bb0f52d3d5641b56.pdf
    • https://static.usrfiles.com/ugd/289c5e_c17ed44226364d0fa1e32094f196e1c0.pdf
    • https://static.usrfiles.com/ugd/9219f8_2122601f95c54a639761712a80f2e35f.pdf
    • https://static.usrfiles.com/ugd/451461_16199fe0168c442a978fe58886bd4e2f.pdf
    • https://static.usrfiles.com/ugd/912de2_507c41aad18440e7b710fd9e518eed0e.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a11.bin
0d09b6a65e0d7c0376c7ba690bd46f88b12889b0823ecd7d0b8219957eab4253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A11 4820 bytes
font_01_sfnt_off00007a74.bin
c16d5b23f6e29102f123cae390f797714becf01429ab20ff328d30a64886a552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 14828 bytes
font_02_sfnt_off0000a88a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA88A 4324 bytes

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