Malicious PDF — malware analysis report

Static analysis result for SHA-256 777f34c3de5b97fb…

MALICIOUS

PDF

39.7 KB Created: 2020-08-12 06:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0547ae8b13f126280ffbac7906dbc69e SHA-1: 2b6e9e2f8f4079c51bdc9f7c880848413e126c17 SHA-256: 777f34c3de5b97fb2fbe4d5b8fcc90d612421ca2a9763f84c871399e062b764c
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to download exam books, which is a common tactic for phishing or malware delivery. The PDF_SEO_LINK_FARM heuristic further suggests the document is part of a larger scheme to distribute malicious links.

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/pify?keyword=sbi+bank+po+exam+books+pdf+download
    • http://jexuxelu.branperf.com/uploads/1/3/1/0/131069839/fonititodim_jewavotetedaki_vevudu_turamukuzaz.pdf
    • http://mefaz.bearsheadminis.com/uploads/1/3/0/8/130813765/d3a7a5bf963e4.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/femizi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/florida_driving_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • http://mabaj.pentangle-arts.square.site/uploads/1/3/2/7/132740892/xigalefikuwan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/tatuvaxame.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/40858080350.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/ludepelidem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/12067887034.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/26243418520.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/61437877939.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65621046881.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_off00005a36.bin
e39e97bd505d7420b5ba7bec42b2af12c4e7e94810faff8f154f18175d702bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A36 5556 bytes
font_01_sfnt_off00006d1a.bin
1f30ab48daf14f9e04af6586c245f431ca61cf3a216e875b5a906cdc7fad7364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1A 10332 bytes

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