Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe61f4843278ff88…

MALICIOUS

PDF

54.7 KB Created: 2020-08-24 07:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbd5a5cde1881a603617ec56db035557 SHA-1: e66e20621995102ca16377ca359388b40094c8ba SHA-256: fe61f4843278ff882ae28a1aeaf2b313d74ac55db984130e9679c75384d74e30
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=free+slider+templates+for+wordpress`. The document body, though heavily obfuscated, contains text related to 'free slider templates for wordpress' and the malicious URL, indicating a lure. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning or redirection scheme. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=free+slider+templates+for+wordpress
    • http://files.drbrightman.com/uploads/1/3/1/4/131406843/a5c5332dfd6.pdf
    • http://wiwalelo.homemeadconstruction.co.uk/uploads/1/3/1/3/131379706/3795620.pdf
    • https://cdn.shopify.com/s/files/1/0440/4353/4486/files/nj_paid_fmla_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/nogibesel.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4357/files/nigojaguxalazemojaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/xafubimeziran.pdf
    • https://cdn.shopify.com/s/files/1/0434/3742/4807/files/ff13-_2_infusion_guide.pdf
    • https://cdn.shopify.com/s/files/1/0462/1674/1018/files/harris_benedict_formel_pal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/82370525977.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/jojopokifizuvoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/pafakurosemerumuwamuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/oll_and_pll.pdf
    • https://cdn.shopify.com/s/files/1/0440/0254/1726/files/business_plan_example_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/40357395186.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_off00009926.bin
4638f0fe1f26ddfac95d7abb4edf587baad94d33cc011873118a427e7c610c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9926 5232 bytes
font_01_sfnt_off0000aaf3.bin
af4da44064ef4652e55406c846a4313fc617bcdc03c28d1fda18336182b5af8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF3 10344 bytes

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