Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc35da2f622fe9cd…

MALICIOUS

PDF

52.8 KB Created: 2020-07-20 01:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8210a7f57ff93b4d62c901df9ea3f570 SHA-1: 6cedad4aab8a5a8f57d08c1b4f6c49d5c143d3c6 SHA-256: fc35da2f622fe9cde2dcabc50f918ac1d4e0ccefdfd344ff19f1a0dd2187f47a
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 URLs, indicating a link farm designed to redirect users to potentially malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, and another flagged a mass external PDF link farm. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

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=escasez%20de%20agua%20pdf
    • http://files.petandtortoiseworld.co.uk/uploads/1/3/0/9/130969572/3448242.pdf
    • http://files.onbradstreetfarm.com/uploads/1/3/1/8/131857756/549221.pdf
    • http://files.missjoyadams.com/uploads/1/3/1/4/131484328/faxanipovuj.pdf
    • http://files.nevereverdull.com/uploads/1/3/0/7/130776130/bosekodarep.pdf
    • http://files.aliciahitephotography.com/uploads/1/3/0/7/130775556/gamupadasufilexo.pdf
    • http://files.kecns.org/uploads/1/3/1/8/131871864/movolemamofejujukajo.pdf
    • http://files.selectricartists.com/uploads/1/3/1/4/131407655/2763129.pdf
    • http://files.crustbaking.com/uploads/1/3/1/0/131069764/rejufa.pdf
    • http://files.eat3foldmobile.com/uploads/1/3/0/7/130738484/4479377.pdf
    • http://files.eat3foldm
    • https://folumos521991706.files.wordpress.com/2020/06/gabefumunazizuruwoluxaz.pdf
    • https://disajunumar650854456.files.wordpress.com/2020/07/xorozejojujob.pdf
    • https://kanuwajatido.files.wordpress.com/2020/07/35386841743.pdf
    • https://woniwefis.files.wordpress.com/2020/06/suzubadezimisanunove.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/44498613683.pdf
    • https://cdn.shopify.com/s/files/1/0437/4167/5685/files/8736417281.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/nunino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66491839223.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/gutizanegikele.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/32795914697.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/50795602785.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/46753111003.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_off00008f47.bin
f95726a5de76b719972a9185735c6be286dfdbc34e74ad791824a40a57064d78
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F47 4740 bytes
font_01_sfnt_off00009f79.bin
9d2bf341909e7e26e7a47f45f923af2f7ffc47162353cc35bbc014618621fdfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F79 11364 bytes