Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7a4fb1093eae77…

MALICIOUS

PDF

42.4 KB Created: 2020-09-17 02:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7c62a79b9c3dded2cec98be7c55702f SHA-1: 62d3bb12387cf86c8e9736e4fe2055af7b2d0aa2 SHA-256: 9b7a4fb1093eae7700ae055bb6c6f60213f8df082f585ff25631d45ae694d8a2
128 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download button, specifically mentioning 'Game gem apk download for android'. This link redirects to a known malicious domain, ttraff.me, which is likely serving a malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting an attempt to manipulate search engine results or distribute content through a large number of seemingly benign links. The presence of a call-to-action phrase further supports the lure. 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.me/wix?keyword=game+gem+apk+download+for+android
    • http://dezopurar.quiltwithleslie.com/uploads/1/3/1/0/131070487/wobobugitifukadiweki.pdf
    • http://zanagonu.ttsolarandwind.com/uploads/1/3/0/8/130874359/pubamur_xudikilirun.pdf
    • http://dafijoroj.jessejamesgaming.com/uploads/1/3/2/6/132683071/476409.pdf
    • http://nuxumuvir.babyg-lash.com/uploads/1/3/0/7/130775583/1617803.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/glencoe_science_biology_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/angular_js_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0459/1285/0581/files/jabiputasitozapetogov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/85935844192.pdf
    • https://170dc11e-794c-4245-9b7d-eeb86e4783cb.filesusr.com/ugd/fe83c3_692c88cc286344aa995265e87194f4a8.pdf?index=true
    • https://816993af-85d6-44ed-8494-5310538e334a.filesusr.com/ugd/b6edda_3a323663df874fea8f3a569b8fd56dfb.pdf?index=true
    • https://b7cfb3c7-97b9-4c93-9f4d-cb44b76fb564.filesusr.com/ugd/2072cd_e4a0e05326c54df28c14529bbe495638.pdf?index=true
    • https://a2c58202-9e1f-4764-b225-3519ace42921.filesusr.com/ugd/a467d2_d557feea1adf4c66b9c25076d51e3987.pdf?index=true
    • https://9db8db56-a3eb-43eb-a944-ab43dcf2e5be.filesusr.com/ugd/e3ed1f_08a332731f5740d0bfb478456ff9c197.pdf?index=true
    • https://6c36255e-896a-4394-8443-da524a598a1b.filesusr.com/ugd/b7306e_790db478af7244b58e101a07102707cf.pdf?index=true
    • 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_off0000669e.bin
b763aca5909a2533467d7d5a39499e7c81897f65914d3b5bd8eb69cfb7c8e17b
pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 5372 bytes
font_01_sfnt_off000078ea.bin
6177c4471d3688d0c21ad9630f954e3eae12b25dc1ceadfe47eae0ce945d44f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EA 10528 bytes