Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb20acd34b69c9d…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 03:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502abaf908c23d7479a85d6d0afe96b2 SHA-1: 05bcff22ecbf7e02930a4b1dd7a6dc0b390b9d06 SHA-256: 3bb20acd34b69c9d3d502b6e07799787886d785e7d8c25262e63ec0fa0017bd6
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, a common tactic for redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is further obfuscated by a keyword parameter. Another heuristic indicates a PDF link farm, suggesting an attempt to game search engines or distribute malicious content. The presence of a 'download button' lure reinforces the malicious intent.

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=total+conquest+apk+mod+revdl
    • http://fanewe.tracygs.com/uploads/1/3/0/8/130874629/wubafevep_gevixivogi.pdf
    • http://zunetebi.niswongercare.com/uploads/1/3/0/8/130814328/govetabuful.pdf
    • http://sasufo.helpurchild.net/uploads/1/3/1/6/131606271/gufoxufu_romugiv_tizitazejodup_fokoxaso.pdf
    • http://files.gladwinfmc.org/uploads/1/3/0/7/130738841/3175606.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/sugaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/nikixufekapebo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/nogapisasaxemidodizonug.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/alumni_meet_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/vagixivukamavojer.pdf
    • https://cdn.shopify.com/s/files/1/0440/5959/0806/files/articulaciones_del_hombro.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/loporedejexitosalatob.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006075.bin
e6342c886d3d51db21600289eb6b4060bcb117e0d8c7435c65defab3cf5d080a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 5252 bytes
font_01_sfnt_off0000723a.bin
8a2266bc4dd953851d459605c49f9e2f095d33016afd5c4b7a54646fe5e38b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723A 10088 bytes
font_02_sfnt_off000094d6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D6 4324 bytes

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