Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83c25dcf79b0795…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 13:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91029ff7ad11c1e8e75405bd6705e4fe SHA-1: 71eb14397850b19c89d3c66eaa74dcb5159e4a72 SHA-256: f83c25dcf79b0795637b6b3545ba1d0e1d9f846cc46c4c0560ef89e2dcd5d1d8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious File:Malicious Link

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate that this is a link farm designed to either lead users to malicious sites or manipulate search engine results. The document body itself is largely unreadable binary data, but it does contain the malicious URL and several other Shopify-hosted PDF links.

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.ru/pify?keyword=why+information+technology+is+important+to+us
    • http://files.integratedbodymind.com/uploads/1/3/1/4/131408899/362880.pdf
    • http://files.eastlakecongregational.org/uploads/1/3/2/3/132302916/6851984.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/nfl_week_6_picks_2019_bleacher_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/19081920246.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/minecraft_wwe_skins.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5961/files/litoxoturorisudatug.pdf
    • https://cdn.shopify.com/s/files/1/0437/4983/4901/files/texte_en_anglais_pour_apprendre_a_lire.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/tidad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/bularelewupupug.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/bls_cpr_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8445/files/bihar_iti_counselling_date_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/nedugoduzugokik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/xozatesazafapegonesikig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/lebebezalikegeset.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_off000069c7.bin
2fb33720a61188e8571db788892a9c23fcec97631563ef91af0f46e922305985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 5544 bytes
font_01_sfnt_off00007c8b.bin
91e04bd29ad48f364daab7b1cc6fce8698335dfb94f4e85c6f622ee4af55bc80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 10300 bytes

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