Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1b067d502fefec…

MALICIOUS

PDF

35.8 KB Created: 2020-08-08 20:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c115493c6c082c5226a9c859d6aeb571 SHA-1: 3e9b098668015da5352b7862fd9b86127328883c SHA-256: 3e1b067d502fefec58e3f74c354139d3145f3102b4c6f187dda8a1ea0724711c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=reading+verb+to+be+simple+present+pdf'. This indicates an attempt to redirect the user to a malicious site. The PDF also contains a link farm, suggesting SEO abuse for distribution. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=reading+verb+to+be+simple+present+pdf
    • http://tozibe.rent-a-ramp-cheltenham.co.uk/uploads/1/3/1/6/131606490/jujirobasifekag_jewewawijadipob_wekuwavozu_kalifesumamem.pdf
    • http://fonesapi.whogivesascrapcolorado.com/uploads/1/3/1/3/131383664/7894999.pdf
    • http://rexugozuj.chrisvosters.com/uploads/1/3/0/8/130874284/8535399.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/medical_terminology_for_spanish_interpreters.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/dukajopexilupibujumaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/zibisizironumaritewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/34069745868.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/laboratory_safety_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/wolewiwegapajave.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/9247005539.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/sanuvena.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/92225508491.pdf
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/71317486875.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.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_off00004e96.bin
12b57ff667473d40af33f21af9ee4f9961a16105fd71a72d2ee07905a2b4a1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E96 5568 bytes
font_01_sfnt_off00006178.bin
6368122f284ec2d78408303daf5a9689401092c1ae60aa84383611103c0dee75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 9732 bytes

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