Malicious PDF — malware analysis report

Static analysis result for SHA-256 347a145ba315bb6a…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 10:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010d4de1fb817a882bd98d19f48898fa SHA-1: 92dfe7a0a969cf70baa20c11ba79d34f8813e25e SHA-256: 347a145ba315bb6a53502fded14b3e407b43b64b6a913ef4a1fadab74da16780
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'iTunes for Mac 10.10.5', which is designed to lure users to a malicious site. The PDF also functions as a link farm, pointing to numerous external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/pify?keyword=itunes+for+mac+10.+10.+5
    • http://sixejafo.childrenssunflowerhouse.com/uploads/1/3/0/7/130775320/ravesatodoxu.pdf
    • http://lezeji.auntlindascottage.com/uploads/1/3/1/1/131163864/kovisemiworize-bozavegarawit-muxeri.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/wudenijud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/64714127689.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/2333714411.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/pdf_reader_viewer_adobe_acrobat_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/zegapuwitifapuseze.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/fail2ban_permanent_ban.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/pearson_education_inc_2_worksheet_answers.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_off00006b3c.bin
e7b6edf929d2dcaea2fcf1fb3ba22a43728b1e031ac824916debb97be9111a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3C 5284 bytes
font_01_sfnt_off00007d22.bin
252a8d015047122611e25141d4a8b6ef4d703fa6db4e948d2b7e741c608ff180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 10316 bytes

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