Malicious PDF — malware analysis report

Static analysis result for SHA-256 361a25fafb5e5d5e…

MALICIOUS

PDF

36.8 KB Created: 2020-08-15 18:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f8b66f6674138714b98d33a3bfb8ca SHA-1: df216d14c0a4b64876d9fa5bd07e15f5d22d15d5 SHA-256: 361a25fafb5e5d5e6317cc49a3ef4f404986969f4cd1a6bd973b636dff09ef7a
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=flatten%20pdf%20adobe%20acrobat%20xi'. Additionally, it exhibits a PDF link farm behavior, with numerous embedded links, many hosted on cdn.shopify.com. The presence of a 'download button' heuristic suggests a lure to encourage user interaction with these links. No scripts were extracted from this sample.

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=flatten%20pdf%20adobe%20acrobat%20xi
    • http://files.bethelagapeministries.com/uploads/1/3/1/1/131163683/172cf7bd08.pdf
    • http://files.pontiaccc.com/uploads/1/3/1/4/131437530/3674602.pdf
    • http://filataja.wedgwoodcoop.org/uploads/1/3/1/4/131438437/xemazet_zozujiru.pdf
    • http://files.woodstockvolleyball.com/uploads/1/3/0/8/130814124/bazoki-raberawipu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/penguin_readers_level_6.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/barbarian_5e_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/mavugufazadutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/botany_syllabus_for_ias.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/xisite.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/39875899482.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/kozurid.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/hbse_10th_class_result_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/lenemugovolanir.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_off000051a3.bin
9b69f8743da88196255e5cba22b420e178b8b7854ad84145945a244db9964277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A3 5132 bytes
font_01_sfnt_off0000632d.bin
37a5acc4e70dfc8274ba065e8592d1454fbd30f9631097ee09bb2ca50f98e2ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 10568 bytes

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