Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25fbded525848d3…

MALICIOUS

PDF

45.9 KB Created: 2020-08-24 17:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6300d7dc57298c932d69687121f6ee33 SHA-1: 5e45f69660e0f7cacc13be218a41b1c3a04ad57f SHA-256: f25fbded525848d3a06ac1e1e6aece8e15325d8d4d1637f8823966aed1c4001e
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'instructional design template' and the malicious URL, suggesting a lure. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely as part of a phishing or credential harvesting campaign.

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=addie+instructional+design+template
    • http://vojab.bankslawyers.com/uploads/1/3/1/0/131070357/kamevezazotarutuxi.pdf
    • http://tebebu.eastkentclassicmotorcycleclub.co.uk/uploads/1/3/0/7/130738667/rarade.pdf
    • http://zixowob.lasax.org/uploads/1/3/1/3/131381521/lumexowuwal-kuwukibawoniki-jofudukiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/8564765139.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/59139751124.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/84436585609.pdf
    • https://cdn.shopify.com/s/files/1/0439/0528/6296/files/graphic_design_retainer_contract_template.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/list_of_english_affixes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/majarasozetoku.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0804/files/26163390318.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4966/files/volume_of_rectangular_pyramid_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/balanza_de_pagos_chile.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/zobomowop.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/kototigapovitoburukosir.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_off000073cc.bin
d52d524ecccb25501500474a8864dda0d633ba75d728943904613b6963dfc36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 5380 bytes
font_01_sfnt_off000085f7.bin
9c709fb8d63b9829bd6f69f7a8ba8a98e7a079bb1447ebcf2a708675bbc6a219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 10700 bytes

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