Malicious PDF — malware analysis report

Static analysis result for SHA-256 115c13e200921662…

MALICIOUS

PDF

42.4 KB Created: 2020-08-25 22:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d654f9eb39e959f1ae9cd41f46ee740a SHA-1: f77fb3f0df5d3a141c447d970d26be1b6d5ceeec SHA-256: 115c13e200921662a9b7c73ed8356fd9524f39d4b5cb9268038542834dd5d062
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=my+wicked+wicked+ways+sandra+cisnero
    • http://files.acucenter-richmond.com/uploads/1/3/1/4/131408954/ziwaguwe.pdf
    • http://files.nativetwiststudio.com/uploads/1/3/0/7/130740166/zubikasonop-waxaramon.pdf
    • http://numuwulir.information4felons.com/uploads/1/3/2/6/132695601/sexulotarawu.pdf
    • http://jipax.jasonenslerphoto.com/uploads/1/3/1/4/131482995/xawifigenup.pdf
    • http://files.cartoonpartysketches.com/uploads/1/3/0/7/130775156/594b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6923/3557/files/cqc_report_riverside_nursing_home_sherborne.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/jatojo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/gcse_algebra_questions_foundation.pdf
    • https://cdn.shopify.com/s/files/1/0433/3581/1231/files/rirutoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/320236289.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/endorsement_letter_format_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/sikufumanane.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/bolt_nut_dimensions_metric.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/kadigexukixejuje.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/example_of_qualitative_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/46430932723.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_off00006730.bin
03d85f8d9bc55ac78f91d10ad6ca43982457c37188ed2b104215cb999350b74e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 5164 bytes
font_01_sfnt_off000078e2.bin
b456177aa3ca4896ad039f4b4923905939431ee4359ade28b873ea9b9c20538b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E2 10448 bytes

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