Malicious PDF — malware analysis report

Static analysis result for SHA-256 463eb3cdaef2b5fd…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 18:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41384aeb71f935e8b665f68024fda53c SHA-1: a024bae16108b21c18313729d11012231b4eaf8f SHA-256: 463eb3cdaef2b5fd7ea44c2f4b312a6f32967b534d9c0205124e428ac79565dc
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at `https://ttraff.cc/pify?keyword=boysen+paint+color+chart+pdf`. The document body, though heavily obfuscated, contains references to "Boysen paint color chart pdf" and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links indicates a link farm strategy to improve search engine ranking and distribute malicious content.

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=boysen+paint+color+chart+pdf
    • http://files.chiropractic-now.com/uploads/1/3/0/7/130775265/dujunuwog_ponilavanizo_lukuwovoba_wugenulam.pdf
    • http://defat.tubatalk.com/uploads/1/3/2/3/132303195/gixadegelanob.pdf
    • http://files.culturemushrooms.com/uploads/1/3/1/0/131070527/674feb9acf8d97.pdf
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/6122723394.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/64796963070.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/natixujivurufukovekatore.pdf
    • https://cdn.shopify.com/s/files/1/0448/5634/4737/files/bulats_vocabulary_b2.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/opencv_install_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/99276174190.pdf
    • https://cdn.shopify.com/s/files/1/0445/3341/6095/files/kuxezosupowimigexuvuvik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/75578996801.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/libros_de_baja_autoestima_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/vector_space_axioms_proof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/talojujif.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/41784310968.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/bacterias_definicion.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_off0000608b.bin
d120f6591a27aa9e4ec8ae2f63a1431274e78564c280f8ab9b14be0e5ccf0323
pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 5396 bytes
font_01_sfnt_off000072dd.bin
50ba6ea849fed7791f0fe3a307c9ccf9f5b3b1ec341871215091e6573b37b29c
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DD 10892 bytes