Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc6bc4fad548e78…

MALICIOUS

PDF

38.2 KB Created: 2020-08-29 18:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96de251ea8014995307e195aafd74458 SHA-1: cea3b9b99f4ce8f35f7dfed7d742a42d1f618978 SHA-256: 5cc6bc4fad548e7833c67a155f48c455855619cef1902c35d2d43c6f0fa17058
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for search engine optimization, directing users to a URL that likely hosts malicious content. The presence of many external links suggests a link farm or redirection strategy to obscure the final 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.club/wix?keyword=purify+my+heart+chords+d
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0455/4008/1829/files/cdigo_penal_comentado_bitencourt_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/cricket_score_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://static.usrfiles.com/ugd/b8c837_11d7e0a432bf4fbebf5515a8cdde996c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c57a39f659d94095ad8bea18dad3c719.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bfe05a77a1b4d5eabd0d05d04a283b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_64ccf810d82c4e95b00fd7b0f7cf879f.pdf
    • https://static.usrfiles.com/ugd/b8c837_654768dc757848ccb55b075d94197deb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6071401020040e89cf7e0f04e877af2.pdf
    • https://static.usrfiles.com/ugd/b8c837_841b51e9e56641518f1ee9788556fad4.pdf
    • https://static.usrfiles.com/ugd/b8c837_463de93d2f4c4289be6300a96b299f5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7462a882ca2b464dbee0ae7e5f646a61.pdf
    • https://static.usrfiles.com/ugd/b8c837_824834d97be84c3589c608d1eae0b7e8.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_off00004dd5.bin
b4a9ad5b8171e254c934dbd9e4750d6ad77ceb53919d7e2bd59c7e70a9ffa482
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD5 5332 bytes
font_01_sfnt_off00005fce.bin
a8a749d540ef30983ab47587a2685adbb976c0e1e40c66d6242c628e22dc8706
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 13392 bytes