Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeac138b2220077…

MALICIOUS

PDF

41.7 KB Created: 2020-07-11 21:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d021d39f3f7b88bef9bcbd4da158f2c SHA-1: bbe84df88182b4b19215b10a8e876b0dde5ddb4a SHA-256: bbeac138b2220077cb3188a54fb236fd2105255f0bc501cb170c47277cd73af1
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely for SEO manipulation or to distribute further malicious content. The presence of a 'download button' lure suggests an attempt to entice user interaction. The primary attack pattern involves redirecting users through malicious infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=websites%20like%20oceanofpdf%20reddit
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdf
    • http://files.smarie94.co.uk/uploads/1/3/1/1/131164311/7233951.pdf
    • http://files.cunyhpcs.org/uploads/1/3/1/3/131380094/dukopoxitobekozezi.pdf
    • http://files.putinbayweddings.com/uploads/1/3/1/6/131607374/4798954.pdf
    • http://files.bhameconsoc.com/uploads/1/3/1/3/131379035/5d35b1ebe.pdf
    • http://files.catholiccharismatic.com/uploads/1/3/2/7/132712120/taxogepokoj_kapuka_kizomibifoka_tagamofulebalos.pdf
    • http://files.sophietrimblephotography.com/uploads/1/3/1/3/131383204/kitegabezepasa_mafaratupifoja_nijeb_jajidajejaxe.pdf
    • https://guzekin.files.wordpress.com/2020/06/64846508925.pdf
    • https://bijogozejut.files.wordpress.com/2020/06/timute.pdf
    • https://sufunitazot.files.wordpress.com/2020/06/37300598290.pdf
    • https://zizojika.files.wordpress.com/2020/06/berupogaxoterizepedefa.pdf
    • https://duvupokupig.files.wordpress.com/2020/06/medipem.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/fubadetipemukisoxot.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/52657637408.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/magobomajudipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/75361312870.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/5754662498.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_off000064d9.bin
8ced18a2e283a391821bd21940d2c449cd9002b9dfcd70e4e5e0abfb14a36620
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 5156 bytes
font_01_sfnt_off00007671.bin
289e578958637bceb56df148c8c1a58d482dee1f9af6b00588cf2be2816c66ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7671 10364 bytes