Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa389a4b2595d2c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-09 13:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73cad440becb9ad656914ea69fbdfcf5 SHA-1: 958b339658b2ab1491dab94875be2391a2ab461d SHA-256: 6fa389a4b2595d2c351d39ddb3603648ddd593f1b243e64a0247103233caf3f7
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'weekly lesson plan template' that redirects to malicious infrastructure at ttraff.com. This indicates a phishing or scam attempt, likely using the document as a lure. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a possible SEO poisoning or link farm tactic to obscure the malicious redirector. No scripts were extracted, but the presence of a malicious redirector and the lure text strongly suggest a phishing or scam campaign.

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=weekly+lesson+plan+template+pdf
    • http://files.daverobinsonphotos.com/uploads/1/3/1/4/131406433/c235f9fe.pdf
    • http://files.jaytaylor.store/uploads/1/3/1/4/131452783/2454183.pdf
    • http://files.nefahistory.com/uploads/1/3/0/7/130740051/rudom-guveniw-daragi-suluful.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5201/4495/files/39603273293.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/positive_affirmations_for_mental_health.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/jisapawezenipevebew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/vobamajifupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/palexonixidenifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/compaia_botanica_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/zaxegawetoparat.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/18983600708.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/lotiguwotaburet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/dumubelabagawenu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/vevasifudezunez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/kixaga.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_off00006b6c.bin
cda15b1fbdee5b85d1c9fda5c7b6b567a55581c9949cf01995479c1cb2f074c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 5268 bytes
font_01_sfnt_off00007d68.bin
2643b4acbf475c3fe51637ebc55d84f77f5455a1fbeec8d9a7fff67278ceb734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D68 10188 bytes

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