Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ca87b907ad5d9d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 01:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d3b7bdae7107369568a5dafd6d34db9 SHA-1: 506561c009cc3fb8b3ddd5edf07e74ec1e73e56e SHA-256: 04ca87b907ad5d9dbc5a05a74d4f153a7f6a42b2780b2a4240add3a32ac8b571
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bouchon+las+vegas+menu+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the primary goal is to redirect the user to potentially harmful 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=bouchon+las+vegas+menu+pdf
    • http://files.voiceofjonescounty.com/uploads/1/3/1/4/131438260/1827386.pdf
    • http://files.lldmsf.net/uploads/1/3/0/9/130968921/beresojeka_nomipidese.pdf
    • http://lupij.kiwiinsurancesolutions.com/uploads/1/3/0/8/130814788/46f9c9.pdf
    • http://files.studentsformedialiteracy.org/uploads/1/3/1/3/131379183/lewenaseberelitir.pdf
    • http://files.andywilsonmusic.net/uploads/1/3/1/4/131414561/tizukabota-jitamevigeludud-degabaselux-redifujo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/audix_m70.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/biochar_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/dozupuluxugu.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/kuxadenaviwimad.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/mafijabedurijejalikigazu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/35727579863.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/60670727380.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/how_to_change_rotom_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/arafat_na_din_ni_dua.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/ppap_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4981/files/56696063531.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/50114434778.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f70.bin
f0ad91fdf7a949e13d7c14f9c0441000835cefaa13e544f18f9c8447d00a67b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F70 5336 bytes
font_01_sfnt_off00006174.bin
b7dbc99e570ec7379654ab7f74072c6a5bb51dbfe701b3419be3a5e8a30e62cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 10292 bytes
font_02_sfnt_off000084f8.bin
339bd93d92cd73c5ef44b332862b6b76f909040f0e7ff8bf1d03a2f4380e26bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F8 16368 bytes
font_03_sfnt_off00009a9b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9B 4324 bytes

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