Malicious PDF — malware analysis report

Static analysis result for SHA-256 610052786870d1eb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 14:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6c065cf0d2baf3249cd024c65fd3cc8 SHA-1: 77d418d7575d51b003f0f98a7c86ec5c7cbecc12 SHA-256: 610052786870d1eb122ff95a23c971c63d79b1573ba5eeb60ffcd62273ee840a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=teacher%2527+s+guide+science+grade+7+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to educational materials, suggesting a lure. The presence of numerous external PDF links further indicates a link farm or redirection attempt, likely to distribute further malicious content.

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=teacher%2527+s+guide+science+grade+7+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9734e7_1fce561b24ee4bc2aeee4c3daaaf0660.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_ca1411986aac4bd286a0edd80edc32f9.pdf
    • https://static.usrfiles.com/ugd/4d400c_89e38fb2ca184d3eaa59738ee8b01dfa.pdf
    • https://static.usrfiles.com/ugd/f80014_537aa99f465c401191a3b6ee3009fb22.pdf
    • https://static.usrfiles.com/ugd/b8c837_909093583bfc4f7880e0198000c6c45a.pdf
    • https://static.usrfiles.com/ugd/af0aa9_c1e1eb29b3a04bd88b2ffcd9dff240b5.pdf
    • https://static.usrfiles.com/ugd/2d1648_d4bb968453394a7494d9a73cce09f6e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f4fad99df694fcabbcc53da8f491fd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8cb9ea401404c31bd09e45a5a2ed76b.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/echa_biocides_submission_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/96651525151.pdf
    • https://static.usrfiles.com/ugd/067ecb_7c3f83d1bdd64274b80dc7098a8fc0fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_25f619fe66cf499da623bac0f75446b7.pdf
    • https://static.usrfiles.com/ugd/76de1a_c812c8dcc3cc49a19c69dfb167a83a7b.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_off000060e7.bin
65f586043de3b5e6e634d6ae39897878ae8299996a1f68db1bbcd7979eb4134c
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 5448 bytes
font_01_sfnt_off00007377.bin
27d0aebb577920dd5196885fcb3f9cdc60514aed3c988a685998bf77e5c6d10f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 10152 bytes