Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab4404e5ea84cc1…

MALICIOUS

PDF

38.2 KB Created: 2020-08-25 22:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4858e177a22ff81319587a44651d56ea SHA-1: 741dcc7c7e7d83f7c1723df0d8fc4fc882120398 SHA-256: 4ab4404e5ea84cc14fe419f424e478953302fdfdc2e225730f3f679d69dcbfd4
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL https://ttraff.cc/pify?keyword=lynx+halloween+costume+fortnite is a primary indicator of malicious intent. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on various domains, suggesting a coordinated effort to distribute malicious content or conduct phishing. The heuristic PDF_SEO_LINK_FARM further supports this by indicating a mass of external PDF links, likely for SEO manipulation or to host further 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=lynx+halloween+costume+fortnite
    • http://files.toniabasihill.com/uploads/1/3/1/3/131379860/dcf8b9.pdf
    • http://fifane.magnoliaruneqcenter.com/uploads/1/3/1/4/131437736/7329273.pdf
    • http://files.soundescapemusictherapy.com.au/uploads/1/3/0/7/130775760/mefuzito_toxidi.pdf
    • http://zexinaka.gilphotography.com/uploads/1/3/0/8/130814328/71257.pdf
    • http://files.fulfordpharmacy.co.uk/uploads/1/3/2/8/132814343/9451370.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/guwusaduwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/kuzifosulemokorazomazixul.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/64466748506.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/cdc_vaccine_ingredient_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/guruviko.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/78067894529.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/xikexegawizapukojuxoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/capital_cities_of_the_world_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3750/8252/files/zizuradovililasowagog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/peliwesojibexe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/bengali_dictionary_java_app.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_off000055c3.bin
17ef2d94f369419dd5e8e5b76e96134e2bcfff8772a3216ce2239ba287d2c66f
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C3 5324 bytes
font_01_sfnt_off000067ca.bin
b93400131e153413b3b75e30063eadad885f6d7315fc1a9bf40f985c5c522b27
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CA 10540 bytes