Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4c50e6e9959abc…

MALICIOUS

PDF

51.9 KB Created: 2020-08-14 19:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf29d8ae8a1181ce23ac86d06f47930 SHA-1: 4fffa0c1bb250ded7f7bf10f67e5ef62c32e0fe0 SHA-256: ac4c50e6e9959abc867bd0076128f8831cd6537fbc619bd399d32aed97b86ed3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to an academic exercise and includes the primary malicious URL. The file's structure and embedded links suggest a phishing or redirection attempt to malicious infrastructure.

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=exercice+transformation+chimique+ou+physique+5eme
    • http://files.whizmeal.org/uploads/1/3/0/7/130739369/f30037cba12.pdf
    • http://files.economicsuniverse.com/uploads/1/3/0/8/130874594/442dc7863.pdf
    • http://witaki.melissasugarman.com/uploads/1/3/1/4/131454065/3404020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4383/9385/files/25962968309.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1018/files/92128341201.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/rukaxosafazosapilazafa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/lewojepidozimobegut.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/tibikifirinajikakudas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/15240526362.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/94331517666.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/vakez.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/lysistrata_jeffrey_henderson.pdf
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/rya_book_bank_application_form_2020.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_off000087e2.bin
f1fdd2e3f20508f8c75cc9a1820f38048bbff39ec51b8a4729332fcfcf8e0ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E2 5600 bytes
font_01_sfnt_off00009ad7.bin
38c09146266efe649cde174c3f8635a382b91bcfd169b40bfb7c22f7577a0fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD7 12148 bytes

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