Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8fc43a4ac5435f…

MALICIOUS

PDF

43.9 KB Created: 2020-09-07 23:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a125996c7d0911aca745078051a37574 SHA-1: 231eaccf57a560f49c56f2a9ad82819810fea152 SHA-256: 9d8fc43a4ac5435f6c607d5f35704aa064440ef873d0f74b64d0b42411861f11
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=ard+mediathek+filme+en+mac'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0440/4543/5030/files/3846049783.pdf'. The document body, though partially corrupted, contains text related to media and the malicious URL, suggesting a lure to a malicious site. The ML classifier also flagged this PDF with high confidence.

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.club/wix?keyword=ard+mediathek+filme+en+mac
    • https://cdn.shopify.com/s/files/1/0440/4543/5030/files/3846049783.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/hanuman_chalisa_telugu_download_ms_rama_rao.pdf
    • https://cdn.shopify.com/s/files/1/0429/0261/8278/files/vogikadojuledelutuked.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/impeachment_process_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/fewesewatomazuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/bolajinuler.pdf
    • https://static.usrfiles.com/ugd/76156b_e60f4d836f134c289ea0d76d08813e37.pdf
    • https://static.usrfiles.com/ugd/87ad98_f8c0a4b0619a4afdbc6afdbc02ffda82.pdf
    • https://static.usrfiles.com/ugd/96bf9d_dc4157a2bbce4419b8321a4e6fc7e004.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/buselesekilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/eclipse_wax_color_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9642/files/83759353631.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_off00005e69.bin
0cdc69281ce41480886f39a97ed7461036c2d723308c4fd2367d2fe3443e25c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 4816 bytes
font_01_sfnt_off00006e88.bin
665a21309cd41dc8eac48da90febf6bd84e639859c2310038112a5ff2e2178a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 11232 bytes
font_02_sfnt_off0000935a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935A 4324 bytes

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