Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be948bc6e667135…

MALICIOUS

PDF

40.4 KB Created: 2020-08-16 16:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12cda39b24069f87cc68786e63c0941 SHA-1: ba60c4327f83e856cd6b937db0fb87aa3fa7075c SHA-256: 1be948bc6e667135a84d6b6a374f1323f57877386728a16db88099dc27ce7526
150 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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=osrs+brutal+black+dragon+range+guide', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many of which are hosted on potentially suspicious domains. The ML classifier strongly indicates maliciousness.

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=osrs+brutal+black+dragon+range+guide
    • http://sufepob.lakesideschnauzers.com/uploads/1/3/1/6/131637047/wadizorusunovim-xenimefosita-jotozere-salifixowapuso.pdf
    • http://files.terryrich.co.uk/uploads/1/3/0/8/130813804/zojuwizom.pdf
    • http://xafakufe.pandakungfucenter.com/uploads/1/3/0/8/130814238/8079589.pdf
    • http://files.tateliberaswanson.com/uploads/1/3/1/4/131411688/3546704.pdf
    • http://files.orca-archaeology.org/uploads/1/3/1/4/131437123/zudejuxubalerimug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/vezikezuru.pdf
    • https://cdn.shopify.com/s/files/1/0439/2783/0696/files/mogikudagafazo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/23406998511.pdf
    • https://cdn.shopify.com/s/files/1/0433/2254/0185/files/vitamin_b12_deficiency_anaemia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/37932197689.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/12359343925.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/ps4_error_ws_37397_9.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0469/files/apa_6th_edition_reference_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/free_sheet_music_score.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_off00006011.bin
d00d64d66c3ba94890048f3b93e171766ab6df2591fa14366c8deaec2b616691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 5336 bytes
font_01_sfnt_off00007241.bin
3862c83b87daef1934b8f864b18ec0597a1f450ee91b7983a794a6f5af4a1910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7241 10180 bytes

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