Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c9f54d0093dada…

MALICIOUS

PDF

45.0 KB Created: 2020-08-10 15:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 967bbfe02b94b5b55708e2d1231f9b87 SHA-1: b0c00e6cf8309ccf667667c9521104f31d6c76f6 SHA-256: 59c9f54d0093dada8bff11dd7bf4f233bc6f4fca383c645fa89f79aa8881f820
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=analytical+chemistry+lecture+notes+pdf'. This URL is designed to lure users into clicking by pretending to offer lecture notes. The document body also contains this URL and numerous other links, many hosted on Shopify, which is characteristic of SEO link farm techniques used to distribute malicious content. The primary intent appears to be redirecting users 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=analytical+chemistry+lecture+notes+pdf
    • http://xenude.hiawasseeapparel.com/uploads/1/3/1/6/131606069/nedisulumizuvo.pdf
    • http://files.doriswk.com/uploads/1/3/0/7/130776158/8221435.pdf
    • http://files.beth-vickers.com/uploads/1/3/1/6/131606165/lubosidavidapo-jawedegijegemig-vuwokesatarokag.pdf
    • http://files.stambrosepreschool.org/uploads/1/3/1/8/131857315/zifumutepabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/nedusakan.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/present_and_past_tense_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/free_education_law.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/20669957064.pdf
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/43694609832.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/10300450809.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/biology_question_paper_2020_state_board.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/vogosubibokopuvenuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/obc_caste_certificate_form_assam.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_off00006d65.bin
aadeb3a25cbc54b49b837e9d8e56f5f47728376cb4b2d01dcde7f49d8c6ecad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D65 5484 bytes
font_01_sfnt_off00007fe0.bin
cd2485b47480cda77dfc070d6207dbf181b152cace5ee530a6e11351af4cc870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE0 12100 bytes

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