Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c820f8a3491d383…

MALICIOUS

PDF

34.7 KB Created: 2020-08-30 00:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e1fdda6d00960aae657e9bad38f15da SHA-1: b1e5236c5059dab46b725eef8d4e3e7b68b4039f SHA-256: 2c820f8a3491d38323c955e0bbb57d8e152b019f4a90572492cffdefd82af64e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=cours+bts+maintenance+industrielle+p'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external links, many of which are benign but serve to obscure the malicious one. The document body, though heavily corrupted, contains the malicious URL and a benign-looking PDF filename, suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=cours+bts+maintenance+industrielle+p
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/hide_navigation_bar_back_button_xamarin_forms.pdf
    • https://cdn.shopify.com/s/files/1/0452/2475/5357/files/risk_management_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9994/7169/files/15424667790.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/35741718890.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6e6c3af0e04fbc8a3a456fb6f199ea.pdf
    • https://static.usrfiles.com/ugd/34e21e_0b9d7f8afc5248088237326096833e73.pdf
    • https://cdn.shopify.com/s/files/1/0462/3669/6736/files/63218870621.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3967/files/spelling_rules.pdf
    • https://cdn.shopify.com/s/files/1/0461/9688/3614/files/2347265048.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/jafabenalowanuwekumiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/69423492804.pdf
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/rugepupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/minecraft_0._12._0_update.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/jozopovadapopuridajov.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_off00004b11.bin
8a45a3c3a5c4357529178d1df417186b369186237fbc4b2e430641bc8a99ad7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B11 5264 bytes
font_01_sfnt_off00005cd2.bin
7a612c4c41733dd166fa848cb73e8149d1c5b3f8d69e4a2b799d9b8fbe13983e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 9796 bytes

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