Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a56deedc564dd8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-25 10:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e8359ef5c900d26c376ac67238a720 SHA-1: 08e38baa617e686e7409ce5b68d3dc81b8d5629d SHA-256: 65a56deedc564dd88dfc0c10f216d050e90f66d9fb417647507446f5f040cc61
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary lure appears to be a 'formal letter for credit card cancellation', directing to the URL https://ttraff.com/pify?keyword=formal+letter+for+credit+card+cancellation. The document body, though partially obfuscated, contains this URL and other links, suggesting a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=formal+letter+for+credit+card+cancellation
    • http://files.chassepermanentmakeup.com/uploads/1/3/1/4/131454304/suzitenipef_vugaxuzili_kexamulora.pdf
    • http://jirojive.klaboratory.org/uploads/1/3/1/1/131164471/4270314.pdf
    • http://fazewa.justagproductions.com/uploads/1/3/1/4/131482975/salalalum.pdf
    • http://tesenesum.waldencoffeehouse.com/uploads/1/3/1/4/131453870/ba609d4f8851f62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6812/9441/files/68773959377.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/poredatinupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/7977446031.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/akon_doing_90_in_a_65.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4487/files/cds_2019_form_apply.pdf
    • https://cdn.shopify.com/s/files/1/0460/0781/2257/files/rofawad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/56707072115.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/bhagavad_gita_summary_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/xajinurapomogoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5715/files/zegerafilubedubaviwogira.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_off00006725.bin
2cc435914034193cf3dae7ee83bcc48b6eee9f9a9a933d057a8c93d67461ed74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 4944 bytes
font_01_sfnt_off000077db.bin
1c879322fd4c9a5456ba0cb79fe689f649ec8e5d6ebe87ca142bfb19e742e1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 10144 bytes

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