Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d5d8ceef205edc…

MALICIOUS

PDF

49.8 KB Created: 2020-08-14 11:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 709736a71f94be494db81f0c41b774ef SHA-1: d4e74088c65687e576e7406166f4bc9517185627 SHA-256: 02d5d8ceef205edc7419c4de66a8cbe9ca08800a8ddaed4b43c4565c34dd10ab
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector, disguised with text related to HTML to PDF conversion. The ML classifier strongly flagged this PDF as malicious, and the presence of a call-to-action button further supports a malicious intent to trick the user into clicking the link. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=export%20html%20to%20pdf%20jquery%20plugin
    • http://vetasex.buildingabond.org/uploads/1/3/0/7/130738950/xasisakakurok.pdf
    • http://files.jonathancromer.com/uploads/1/3/0/9/130969129/1119213.pdf
    • http://files.windcatcherjewelry.com/uploads/1/3/1/3/131381003/111bc18a8ce3184.pdf
    • http://files.discovery-dayschildcare.com/uploads/1/3/0/7/130740375/261848.pdf
    • http://files.communication-works.ca/uploads/1/3/0/7/130776245/pemeluna-rulokofawaz-gejuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/1000uf_capacitor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/9735863310.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65028435792.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/13922317493.pdf
    • https://cdn.shopify.com/s/files/1/0434/2569/3845/files/xugokigolorez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/english_grammar_adverbs_of_frequency.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/95616452027.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/86764604736.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/42103962008.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/44834660673.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/vce_file_to_converter_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/74192518067.pdf
    • https://cdn.shopify.com/s/files/1/0439/5941/9038/files/samsung_electronics_catalogue.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007276.bin
6cf3a4c0aecd9285c3fceef8e8bd52ea339efdc55ee1da8b4c662139c166a8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 5396 bytes
font_01_sfnt_off000084bf.bin
abc2800e983c0ac6d8d73f1bf9fe8d25a0bc743e9710f22166d022dd10be6a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BF 16420 bytes

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