Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c884bcdec0df78…

MALICIOUS

PDF

47.5 KB Created: 2020-09-09 18:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50ed909efbc578f96ac1cfd6b355f21 SHA-1: 5f8960e907eaf50627ff49e4593db9e7cfd22c36 SHA-256: 87c884bcdec0df78f521808a1ad07469fe4b35f690bbf1128fdd0ce14e34f3ae
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to deliver further malicious content. The document body text and embedded URLs suggest a lure related to 'Moon book reader pro apk', aiming to trick users into clicking the malicious link. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation to improve the ranking of the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=moon+book+reader+pro+apk
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/australian_guidelines_atrial_fibrillation_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/nunadirarowomamexitu.pdf
    • https://cdn.shopify.com/s/files/1/0445/8296/1311/files/section_3_the_hydrosphere_and_biosphere_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/75049318948.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3507/files/69407463074.pdf
    • https://static.usrfiles.com/ugd/defcb2_c4f50235c8114df7990d4709aa998215.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/hindu_festival_calendar_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2480/8096/files/11869777217.pdf
    • https://static.usrfiles.com/ugd/e3c460_90fe4f63769b4d879185fca487e50a0f.pdf
    • https://static.usrfiles.com/ugd/6924eb_528a4145a2384582a389b788da7f80d1.pdf
    • https://static.usrfiles.com/ugd/0c41e7_88887ed5101b402886159da453563b6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0412d6663414fa8aff2bbdb051e9225.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006681.bin
de8725355cc1294f491fc55149965fab38b240e4e9ff0786dfd5980820fbe8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6681 4952 bytes
font_01_sfnt_off0000776e.bin
8ba4f99923c8e6b49551743f31cd2303fe33f6395d524ac6671958bd289e1152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10420 bytes
font_02_sfnt_off00009b53.bin
ca45562bcb9a2235b24e3b2edc4f65b112b043be98dd73ee8b0e1c06a779e50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 16408 bytes

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