Malicious PDF — malware analysis report

Static analysis result for SHA-256 25498eba48f209c4…

MALICIOUS

PDF

48.2 KB Created: 2020-07-08 21:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cbd2ab9e1b353f153a8fbf81c866114 SHA-1: 5cb65db4dfaee51c766230a6e8705815d724c8bf SHA-256: 25498eba48f209c41aeecc33612207b5581efb6f57e01cad10b3f620fed3ac71
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wb?keyword=apertura%20ad8%20manual', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Apertura ad8 manual' and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious link farm as a manual or resource. The primary attack pattern involves redirecting users to malicious infrastructure through these embedded links.

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.com/wb?keyword=apertura%20ad8%20manual
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://files.jemun.net/uploads/1/3/1/4/131437538/zimef-pafitakimu-kazuwapofi-xefulogekasa.pdf
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • http://files.larryssportsexchange.com/uploads/1/3/0/8/130874128/folerezome.pdf
    • http://files.bethlehemchristianmission.com/uploads/1/3/1/6/131606175/kufuf.pdf
    • http://files.bishopgumbleton.com/uploads/1/3/1/3/131379371/tokasinipegog.pdf
    • http://files.plasticdolls.co/uploads/1/3/1/4/131406835/nepenepuwad_tiredujuzaxuwil_duwil_lovoxeju.pdf
    • http://files.foodwastetruck.com.au/uploads/1/3/1/4/131453332/f3e848c9e3f822e.pdf
    • http://files.ireneoleary.com/uploads/1/3/1/6/131637325/wemikuwajowofa.pdf
    • http://files.artoutofdakota.com/uploads/1/3/2/6/132695493/4805215.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.demirandaguitar.com/uploads/1/3/1/8/131871690/fokodibavuf_zogovisum.pdf
    • https://tusemopupoj.files.wordpress.com/2020/06/rupodekax.pdf
    • https://vajowobago.files.wordpress.com/2020/06/tesezinumuvaxomuluz.pdf
    • https://rarimuvu282494435.files.wordpress.com/2020/06/99402879666.pdf
    • https://bujavam.files.wordpress.com/2020/07/rupovugavulubi.pdf
    • https://gajufivevitu.files.wordpress.com/2020/06/67142403427.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.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_off00007f9b.bin
40339a3d523f256f95a3416929c079583ba51a084d847224a4e5b3276de246cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 4836 bytes
font_01_sfnt_off00008fe1.bin
e996ee124c2605e5826dcf557c7f3204ce8582a6703b8e44dec07c83c55ec321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE1 10508 bytes

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