Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a60167cdb29645…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 04:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b666d1e038abe87c801a196fcec220a SHA-1: 28cca28dec0b8d237085165f2dcb591942f210b4 SHA-256: 08a60167cdb296454febcec0fe8a8897b7d9267c8d4bb4dc6bd247fe81c823bc
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains references to a "Stephen King PDF" and the URL https://ttraff.cc/pify?keyword=it+stephen+king+pdf, suggesting a lure to a malicious site. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or 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=it+stephen+king+pdf
    • http://files.healingaustinmassage.com/uploads/1/3/1/4/131483305/7365992.pdf
    • http://jefewez.garchen.store/uploads/1/3/0/7/130739430/pezuzuzada.pdf
    • http://gefofibi.craations.com/uploads/1/3/1/0/131070719/8189765.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/28879660830.pdf
    • https://cdn.shopify.com/s/files/1/0428/5091/0364/files/how_to_make_scanned_smaller_mac.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/96223136577.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/9931650480.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/the_abundance_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/sebudone.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/detus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/46434042127.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/mumevuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/mufuvevedipejafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/bootstrap_form_radio_button_inline.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/81796898897.pdf
    • https://cdn.shopify.com/s/files/1/0430/4198/0567/files/4507408210.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/attestation_de_salaire_accident_de_travail.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_off00006df2.bin
e5565172312dae374ffccf4156e49b32a601eb6c69d994ff9a0b3c1e414187c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 4964 bytes
font_01_sfnt_off00007ed8.bin
2074b0e7f23b62ba3059ed707e24122542190a2a26eab74c66212d106458a060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 10292 bytes

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