Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5455b8e1c5d0bb9…

MALICIOUS

PDF

42.1 KB Created: 2020-08-23 21:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ead745733cd31895822f25173852c14 SHA-1: 6af0e9b09819749552a81b49668c47244b84e1b4 SHA-256: a5455b8e1c5d0bb989c716e345ff9cd85cf95b532288d5abaf6e1c2808579155
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm or redirector, likely intended to lead users to malicious content or phishing pages. No scripts were extracted from this sample.

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=lysistrata+themes+pdf In PDF document text
    • http://files.catiesully.com/uploads/1/3/0/8/130814411/lotox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/nopuvekirinalonadupom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/pimebiwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/ziwipudigivinukubopasuraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/acca_f9_financial_management_study_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/gofevos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8681/5139/files/sosokax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/loriseperuxure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/spatial_ability_practice_test_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/64425851204.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ea.bin
130778221a60c2a0a817583aa288540b4173d40c8ee355ea4e46a66b56203486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 5292 bytes
font_01_sfnt_off000079c9.bin
78e0b78cfab264196296da024aa42651afdfaf6877d36e527577b3169d963512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C9 9952 bytes

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