Malicious PDF — malware analysis report

Static analysis result for SHA-256 8900eedcd7be128f…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 03:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f15f09d43f5820a4d104b56b5858671 SHA-1: d3ce1b94add44e32adc5ff38212e93c79e140070 SHA-256: 8900eedcd7be128fcdfee4cb744d9e0dfb88ded0a307a0ab92c511f231cd5d5f
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised as a free template. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates this redirection. Additionally, the 'SE_INVOICE_LURE' heuristic suggests a social engineering pretext. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure. The file also hosts a large number of external PDF links, potentially for SEO manipulation or to spread further malicious content.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=free+word+flowchart+template
    • http://files.grndcntrlmag.com/uploads/1/3/0/7/130738876/dibepapiw.pdf
    • http://files.carolynmartinodesign.com/uploads/1/3/1/4/131453648/kesewepevoderu-xopokebisuvatix.pdf
    • http://rixukawoj.artsabella.com/uploads/1/3/1/4/131438641/bf7da496daf1b0a.pdf
    • http://sulawa.psupotomacvalley.org/uploads/1/3/0/7/130740456/3a45e74.pdf
    • http://pexizeve.honest-elections.com/uploads/1/3/0/8/130873982/visux.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/online_scanned_to_word_document_converter.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/cg_police_si_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/48704753316.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/68649451070.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/37678512627.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/godefimufowidesu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/61888903831.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.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_off00007127.bin
500beef04f7e140109fbe2aa495a344d6e30493c097a9c5e0518cd4dc44a9bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7127 5264 bytes
font_01_sfnt_off00008300.bin
23ad20baba42740d62cfa9fdbebcaeb0f3e603c052969d0d379ca0901906eb52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8300 10332 bytes

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