Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcae30b1b310b3f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 11:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a105de5172a77ca1d3e8b989325fda26 SHA-1: 20169f218a0e545d394bcfd5130052f5398ac12b SHA-256: 8dcae30b1b310b3fe2f62e7f15891b5da749c59c29c897fdf7e6760497199c27
90 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 a URL that appears to be a lure for an Android app development tutorial. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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=android+app+development+tutorial+bangla
    • http://files.jacqueline-lin.com/uploads/1/3/0/9/130969148/3aa4d74823d5d.pdf
    • http://files.susantaylorart.co.uk/uploads/1/3/0/7/130775108/07dd2ab2a3e3ae.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/90174608015.pdf
    • https://cdn.shopify.com/s/files/1/0433/6307/4213/files/what_is_a_conformal_map_projection.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/10333748839.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/10204344983.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/explore_the_bible_summer_2015.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/fl_studio_10_crack.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000040a2.bin
a34156a1ba45328ed08190503052e95a8edb3f0de1cbca47bbda5a57e3da8789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40A2 5172 bytes
font_01_sfnt_off00005219.bin
f1fea457aa0670b09a9c73ba7a7056112330b554976c93e716aa0fedc074fac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5219 11160 bytes
font_02_sfnt_off00007478.bin
3098d05fd52d7f2ec677af8c38422da151ddc575a7fafe1ab44e8febadf80220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7478 9672 bytes
font_03_sfnt_off0000957d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x957D 4324 bytes

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