Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0244f533931bb0…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 10:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac068e54e139289614bbb46136cae1c1 SHA-1: 571c54cd948ca907450797a4c8d23af0b710e819 SHA-256: 4e0244f533931bb06d374cf97fd08019375237467a6637ffe8359b7ce3125ac9
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'weekly timetable templates' and includes the malicious URL, reinforcing the lure. The presence of numerous external links, including those hosted on Shopify, indicates a link farm strategy to potentially distribute malware or phish for information.

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=weekly+timetable+templates
    • http://zefus.gypsyunicorns.com/uploads/1/3/1/0/131069991/maxoki.pdf
    • http://lebomet.southernbridal.net/uploads/1/3/2/8/132814930/wupuleguxiwikewo.pdf
    • http://files.goldenbirdhope.com/uploads/1/3/2/6/132695418/rovig.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8135/files/audio_bible_app_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3282/files/jikaluxositolofenipuwod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/fotebanawap.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/business_model_generation_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/sample_school_incident_report_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/major_branches_of_artificial_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0430/9653/9290/files/mathematical_notation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3925/files/83500414547.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_off0000687c.bin
c70ced1b5c5079c275e9b6c07310830f8ab6f831a5d6d1de6ed4588686ef71f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 5188 bytes
font_01_sfnt_off00007a23.bin
0fad792c4985a131625f4e102292834c460f5d7ff8e631f31ed272e710690dfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A23 10752 bytes

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