Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e4ca56ec3f13e3…

MALICIOUS

PDF

36.0 KB Created: 2020-08-24 22:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c81f770cd3f51e68a8100733c8bcdf7 SHA-1: 158545810a9e410cb1ee9f540a1ec12c453fd4ff SHA-256: 86e4ca56ec3f13e3ca23770f2f18224680548af55ad0d8d47d83f4f26a90ef3e
120 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/pify?keyword=files+to+sd+card+app+apk'. This indicates the document's primary purpose is to redirect users to a malicious site. Additionally, a heuristic for a PDF link farm was triggered, suggesting the document is designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the presence of the malicious redirector URL strongly suggests a delivery mechanism for malware or phishing content.

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.ru/pify?keyword=files+to+sd+card+app+apk
    • http://gizurameb.eddyfinn.com/uploads/1/3/0/8/130814921/pisizusafa-nenaxuxuxow-wisafilefo-lalujuberod.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/9625375584.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/73359599965.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/storyz_photo_motion_cinemagraph_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/modapabawezarodazufipine.pdf
    • https://cdn.shopify.com/s/files/1/0436/3767/0041/files/kifizop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/isolated_systolic_hypertension_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/household_chores_rota_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/gokikazojanuvuzati.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/convert_to_word_acrobat_pro.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_off00004b24.bin
f6016a570c7f3d89f08a892669a3f9da1cfa70337030a61e0efbe509e72fb762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B24 5088 bytes
font_01_sfnt_off00005c7c.bin
25a3d1faefd49d5d3129e0eb300e2a47d6b55198e142acc35cba128571121651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7C 13168 bytes

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