Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6b164542580f6d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 03:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cecc88c9a8194a19f58fe4e9dc016e8 SHA-1: 943a385812118b2a2b325e3e084b134dbd41d7dc SHA-256: cc6b164542580f6d19afd14e03189d961a127e866312cdde188683a9038f228d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'class 11 biology textbook pdf' and the malicious URL, suggesting a lure to download potentially harmful content. The primary malicious URL is https://ttraff.cc/pify?keyword=class+11+biology+textbook+pdf, which is likely used to redirect users to further malicious sites.

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=class+11+biology+textbook+pdf
    • http://jikon.behinddallas.com/uploads/1/3/2/3/132303301/benekubizi-wuderixuvut.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/92003074217.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/lukez.pdf
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/good_cv_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/natamujitizanafagujuwomu.pdf
    • https://cdn.shopify.com/s/files/1/0456/8793/1039/files/majevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/91785316360.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7333/0593/files/que_es_el_contexto_situacional.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/kotewisadaparoguvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/adoption_paternity_leave_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.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_off00005eef.bin
a0645273c3972750b1d1a26afa62b3dc45e2b9ad0b77f50ff9c505004767585b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 5444 bytes
font_01_sfnt_off00007196.bin
8965bc0bcf931e6461bee45331773a257fd2a5bcf2dc4d9064e72fe29d87a111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 9980 bytes

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