Malicious PDF — malware analysis report

Static analysis result for SHA-256 7989a00a5101c6ef…

MALICIOUS

PDF

39.8 KB Created: 2020-08-28 08:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43f44ad02cf86811bbc3603236bfdff9 SHA-1: 62e8087aac8045f32c2dc20bb2851cb2bdf487ad SHA-256: 7989a00a5101c6ef9ae777501a654f4ff27238ef11c6c0747b94d7d089c738a4
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Why do dogs have tears in their eyes' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous Shopify-hosted PDF links indicates a potential SEO link farm used to obscure the malicious redirector.

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=why+do+dogs+have+tears+in+their+eyes
    • http://files.hirowheels.com/uploads/1/3/2/8/132814791/mapixukixujovujexesa.pdf
    • http://files.vivafitnessshepperton.co.uk/uploads/1/3/0/7/130775934/zokatu.pdf
    • https://cdn.shopify.com/s/files/1/0450/2742/6468/files/rename_android_studio_project_name.pdf
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/balanced_scorecard_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/94234560749.pdf
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/36878233499.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/zedutatujaminojupekiwak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/opportunistic_infection_guidelines_cdc.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/banderilla_de_tamarindo_informacion_nutricional.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9378/files/waiting_for_the_barbarians_poem.pdf
    • https://cdn.shopify.com/s/files/1/0429/1510/2876/files/46117030572.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_off00005dd4.bin
a6943eb17318d151096d231cddf3f31da0e14eb005b45289afd9f7844a8240fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD4 5232 bytes
font_01_sfnt_off00006fb7.bin
69cf496c76de556356c881890c33cd8e9dda66617f7016322e206b007c79bfd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB7 10192 bytes

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