Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77f69466e82d694…

MALICIOUS

PDF

47.3 KB Created: 2020-07-30 15:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa644f9c61e25982a689972de40b286c SHA-1: 4c210f7af8b16caf2d56cffa8952f4a01e0e7bde SHA-256: b77f69466e82d69440d94a23cf1a4f0be27efb41d8abdc555956309399a840e8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent. The PDF_SEO_LINK_FARM heuristic suggests a link farm, likely for SEO manipulation or to host further malicious content. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains references to 'html to pdf javascript browser' and 'wkhtmltopdf', suggesting a potential lure related to document conversion or generation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=html+to+pdf+javascript+browser
    • http://files.carouselmusictheater.org/uploads/1/3/1/4/131437445/lagevinufegiw.pdf
    • http://files.koolkidzbitz.com.au/uploads/1/3/1/1/131163738/wupare.pdf
    • http://files.suncoast-gems.com/uploads/1/3/1/4/131453219/lisotaje-pevigolipe.pdf
    • http://files.debbiesangelsproductions.com/uploads/1/3/1/3/131380354/gogilopino.pdf
    • http://files.debbiesangelsproductions.com/uploads/1/3/1/3/131380354/gogilopi
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/setujujewuzazaleluzub.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/xutapimu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/97700027284.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/37516361175.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/88964046376.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/rowudijatefoxekaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/visiwovosafoterub.pdf
    • https://cdn.shopify.com/s/files/1/0428/7581/4047/files/sujuwuxotojuforevexiwojib.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/72018920669.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/7708879928.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a40.bin
c2b7d0b830236347868958f4cc6edcf972fa5a69d6b7559e41e6854e995e59a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A40 5312 bytes
font_01_sfnt_off00008c65.bin
9530a0c6fcea329bf78257d1880b8bea7810a45212336820a30bd515713d35df
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C65 10372 bytes