Malicious PDF — malware analysis report

Static analysis result for SHA-256 5896712fab2ed3d7…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 00:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7152a4db1d5f37ab6a1ee239f0ca9c02 SHA-1: abeb00750145fc888e5068e79c287e927006c626 SHA-256: 5896712fab2ed3d7fec7b2dbd8ecaf540d2302ad1d2e007fc0665aa03b6438d2
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains text related to PDF combining and includes the malicious URL. The primary attack pattern involves redirecting the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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=combiner+deux+document+pdf
    • http://files.heartpieces.net/uploads/1/3/1/3/131379749/3776242.pdf
    • http://files.qalimayu.com/uploads/1/3/0/9/130969801/rowomenerotif.pdf
    • http://files.shadygrove71052.org/uploads/1/3/1/4/131406114/zubosovem_vudedine_vofojajonepew_nesulumekis.pdf
    • http://gilasezu.smartsourceconsulting.com/uploads/1/3/2/6/132682327/1615134.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/order_of_adjectives_exercises_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0436/4396/1504/files/madras_university_bsc_maths_question_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/gogagesakukusaruxilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/45029787058.pdf
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/rpa_robotic_process_automation.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/wetenixefixamekul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/i_can_t_hear_anyone_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/33529194155.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/components_of_vocational_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/43451643635.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/261798650.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.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_off0000614c.bin
2820b9a83707d35fc0d175156255b279214ae782c4d127b10637b56f1e83e229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614C 4992 bytes
font_01_sfnt_off0000722d.bin
0d1f0c88f889e734c4afa2e14e976837d528bb9c218b48c9595900cd229432a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722D 11668 bytes

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