Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0492c46422956c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 23:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 371d8a5b0cf27a3f012c371a2e89c7ef SHA-1: 809ea6369fdfdd7cccafed2b77d759ceee8d4a76 SHA-256: 5e0492c46422956c603bf60b9a5fb49ce87124dcd53c3acdcf6e8ed8df217fd7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'https://ttraff.cc/pify?keyword=aseptic+technique+journal+pdf'. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, but the embedded URLs and redirector link are the primary indicators of malicious activity.

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=aseptic+technique+journal+pdf
    • http://files.ryansjewelryshop.com/uploads/1/3/1/8/131857334/babesumuxetodabuj.pdf
    • http://files.nycmoneymavens.com/uploads/1/3/1/8/131856815/jaxono_tanake.pdf
    • http://files.darbybooks.com/uploads/1/3/2/7/132712093/7264076.pdf
    • http://files.tuscarora-tribe-nc.com/uploads/1/3/1/4/131483031/6636366.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0435/9058/2435/files/34397268248.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/79564303850.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/fabofekexolemosolapuwenat.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/76230367465.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/nostra_aetate_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/34532573497.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/bartleby_el_escribiente_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8039/files/itunes_11_download_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/an_archdemon_s_dilemma.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004957.bin
eae855198b54d4de50e670d42d3b2f8160cd052ac7b70f55050d0ecb33757031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4957 5432 bytes
font_01_sfnt_off00005bc8.bin
aa3e7d2709a49239465901610160a069a32b817161fae1e2ef16517f66760dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC8 10320 bytes
font_02_sfnt_off00007ee1.bin
411de88169910c9fe409424fe6de487a28053222b00583d5909d3a618809cf0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE1 16320 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.