Malicious PDF — malware analysis report

Static analysis result for SHA-256 950ead01bd676d32…

MALICIOUS

PDF

40.0 KB Created: 2020-07-10 12:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a303dbf43d4e5c87c6b48f808f0880e0 SHA-1: d112c29c936dfd7d052d34af608874055631b11d SHA-256: 950ead01bd676d32ec08af82ff057df5a1da11983d78fc5b23ba5025d070a198
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The ML classifier also strongly indicated maliciousness. The primary goal appears to be directing users to external, potentially harmful websites through a deceptive link farm strategy.

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/wb?keyword=adorned%20book%20pdf
    • http://files.nphsjrwolfpack.com/uploads/1/3/1/4/131483253/pageponiputi_gosalobire_vopepas_fatibo.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://files.jimpendergrass.com/uploads/1/3/2/8/132815961/xabixejeje-nenowapiwage-jisematonalon.pdf
    • http://files.geraldinefirequeen.co.uk/uploads/1/3/0/7/130776578/zezukoveguveduzudipe.pdf
    • http://files.stgabrielepiscopalphila.org/uploads/1/3/0/9/130969498/c09b01627bce.pdf
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • http://files.kscenvironmentalstudies.org/uploads/1/3/1/3/131398234/19a737.pdf
    • http://files.robirie.com/uploads/1/3/1/6/131606482/4051918.pdf
    • https://kipaxeguvew.files.wordpress.com/2020/06/lezojoxikirenipalazudevu.pdf
    • https://zerigowabag.files.wordpress.com/2020/07/wotepariguvafitof.pdf
    • https://sabuninovaju.files.wordpress.com/2020/06/tenasaza.pdf
    • https://pekakupesile.files.wordpress.com/2020/06/pewuva.pdf
    • https://jolitogobase57815693.files.wordpress.com/2020/06/dipeberodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.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_off000062ca.bin
4dcfe3623f61183b71c565566b36b85a4f22f6f189f214de112d8f473bf06779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 4468 bytes
font_01_sfnt_off000071ef.bin
9ec9bb2ed02f547c51787a0553e81e0c56d20f23871df38607c5c58871c4ccf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 9752 bytes

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