Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87ac67b21bfdc08…

MALICIOUS

PDF

51.6 KB Created: 2020-07-10 08:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dda2c5277c67c6740a4c25b0c25ee44 SHA-1: ffa2e8ee6133062005b2ecd57609cfa8da6ac932 SHA-256: b87ac67b21bfdc08256598b873ce3ad90de9e086a90fe786ae8145dd38746afb
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to 'https://ttraff.cc/wb?keyword=sintomas%20de%20tuberculosis%20pulmonar%20pdf', suggesting a lure to disguise malicious activity. The document body, though partially obfuscated, contains keywords related to tuberculosis and the PDF's creation tool, reinforcing the lure. The presence of numerous external links indicates a link farm or redirection strategy, likely to distribute further malicious content or phishing pages.

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/wb?keyword=sintomas%20de%20tuberculosis%20pulmonar%20pdf
    • http://files.monroesportsmansclub.com/uploads/1/3/2/7/132740549/dupipekokalixunag.pdf
    • http://files.laredounited.org/uploads/1/3/0/9/130969532/jowet.pdf
    • http://files.misshortonsclass.com/uploads/1/3/1/8/131871494/5598380.pdf
    • http://files.diylabourpain.co.uk/uploads/1/3/1/8/131856877/467c3d96.pdf
    • http://files.youthadvocatespdx.org/uploads/1/3/1/3/131398182/rijavojadavopizav.pdf
    • http://files.cranbrookdistrictteachersassociation.com/uploads/1/3/1/8/131871494/8c401b.pdf
    • http://files.madala134.com/uploads/1/3/1/4/131453056/8496004.pdf
    • http://files.vk3sn.net/uploads/1/3/1/8/131871894/d40f274a4b81b4.pdf
    • http://files.danielpsgoh.com/uploads/1/3/0/8/130873758/7861376.pdf
    • https://fupukofove.files.wordpress.com/2020/06/kopakuwafatelavogiwetikaw.pdf
    • https://vimagifa577894512.files.wordpress.com/2020/06/lovofurewataxazu.pdf
    • https://vusuletameta.files.wordpress.com/2020/07/tunuximetemapuvabufog.pdf
    • https://jitunaf.files.wordpress.com/2020/06/79168191082.pdf
    • https://xawuzebufo.files.wordpress.com/2020/06/26433020718.pdf
    • https://wepupip.files.wordpress.com/2020/07/vuxuroxajuxadagafelelili.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38970143778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ralaguguzovepusumizus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83406059157.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_off0000887f.bin
148d3688c19443184c30a61e1a6c46175d3f27a485ec3d24e30f6c657e22bf42
pdf-font-stream PDF embedded font (sfnt) at offset 0x887F 5424 bytes
font_01_sfnt_off00009ab6.bin
bd98c487157078622c4a58e140178c847b399685b0e96967998aeef16b42a3aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB6 11392 bytes