Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadd2accbb957e0d…

MALICIOUS

PDF

48.9 KB Created: 2020-08-27 22:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a221305adae7a9c69736ee1183779cb6 SHA-1: 48d1a0363af174754ae93b760852ff9e9cf9fedd SHA-256: dadd2accbb957e0dddd24e46375044cfa9b01146af9c32d7329cdbcbf6e96fee
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text 'Contoh skripsi akuntansi perpajakan' and the malicious URL, suggesting a lure for academic-related content. The primary malicious URL is https://ttraff.cc/pify?keyword=contoh+skripsi+akuntansi+perpajakan, which likely leads to further malicious content. The presence of multiple PDF links and the ML classifier's high confidence further support the malicious nature of this document.

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=contoh+skripsi+akuntansi+perpajakan
    • http://zuxogoxax.kwbjj.com/uploads/1/3/0/7/130739059/naluluvutitas.pdf
    • http://vazom.creativeteachers.ca/uploads/1/3/1/4/131408984/8886371.pdf
    • http://pimag.popcob.org/uploads/1/3/1/1/131164250/9238655.pdf
    • http://files.re-ventum.com/uploads/1/3/0/7/130775980/nopuxus_wijebov_jutatapobimafa_pegubife.pdf
    • https://cdn.shopify.com/s/files/1/0462/2893/0711/files/dulazel.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/gogeloperabezopomik.pdf
    • https://cdn.shopify.com/s/files/1/0463/1068/6882/files/mann_aamir_khan_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/kemuroz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7075/files/54558184965.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/90900458312.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3629/files/guzitunaviburetolaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/notary_letter_template_free.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_off000075fb.bin
00728d6af2f438228982c5f786df16c1b4dc8ea3d173113094a48c8043ccb7f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FB 4920 bytes
font_01_sfnt_off000086ae.bin
f44369a9548dceea244eee8d9bc9a5aa438365a349e7213ebd6add584a1afcaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AE 15644 bytes

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