Malicious PDF — malware analysis report

Static analysis result for SHA-256 0858d7322681bb05…

MALICIOUS

PDF

38.3 KB Created: 2020-09-07 03:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce9d48f599f50a41c1936e117823296 SHA-1: da9076d16fda196f1ebddb8f37226b6bf5069334 SHA-256: 0858d7322681bb0578ecc09c6e75f4b3c447f61775169cf59ad226cf84940ffc
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.link, which is likely used to host or deliver a malicious payload. The document body, though heavily obfuscated, contains text related to a 'National fire report map' and the redirector URL, suggesting a social engineering lure. The presence of numerous external PDF links further indicates a link farm designed to obscure the true malicious destination.

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.link/wix?keyword=national+fire+report+map
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d4c4cf_8a5165d98a2d4b72954141a28619d1da.pdf
    • https://static.usrfiles.com/ugd/83b1b3_7c7ffb8d23c14ea98ae943744aaef2fc.pdf
    • https://static.usrfiles.com/ugd/e1c37d_398ac45b2d094876acf9e3cc5a7ae74c.pdf
    • https://static.usrfiles.com/ugd/efb3f0_cbbc752f97a54028abd0c4015e6d30aa.pdf
    • https://static.usrfiles.com/ugd/a467d2_7250e949090048a29e357845befe4241.pdf
    • https://static.usrfiles.com/ugd/d5415a_ce464a71140340b3ba77c1c202e529b6.pdf
    • https://static.usrfiles.com/ugd/d54300_977a60ff066c428ca1a2849b81c91111.pdf
    • https://static.usrfiles.com/ugd/227d0f_5c27c6367ac74dd99de63440fe57e6ed.pdf
    • https://cdn.shopify.com/s/files/1/0459/2356/5717/files/archery_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekefokatonerosabiwifeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/work_permit_application_form_thailand.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_0ebd2c80febd4cf9a87909d51893ac0c.pdf
    • https://static.usrfiles.com/ugd/c33f71_f30fe49559bb40daac832c4bde2541ee.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058aa.bin
2cab55d359230a682eb909f5d9b93b62e6e2da1574a647c656e35e0da8983189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AA 4840 bytes
font_01_sfnt_off00006914.bin
e0616a758a07b576826d604116afff774238a640eec8119b46c707be920c42c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6914 10588 bytes

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