Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d5742e21f4af06…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 05:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57400e9aeea426d46cb8e92870ddac7e SHA-1: 7a07ac0796ca2a86efd941b3e1a2e3a8a73ee7da SHA-256: 49d5742e21f4af06ef7887fa1a445591e51e4706394941975f2755e1859cb6d1
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 links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a 'chemistry of life worksheet pdf' and embeds numerous external links, many pointing to Shopify domains. One of the primary embedded URLs, 'https://ttraff.com/pify?keyword=chemistry+of+life+worksheet+pdf', is flagged as malicious, suggesting a phishing or redirection attempt. The presence of a large number of external PDF links, including the malicious one, indicates a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=chemistry+of+life+worksheet+pdf
    • http://files.clarksburgcc.org/uploads/1/3/0/7/130775346/vemusira.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/moldes_foami.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/20494102112.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/81450967860.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/54812866651.pdf
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/99820151972.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/basic_page_html_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2584/files/sexibesen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/kedazuxegibenezofuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/46151551186.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_off00005a53.bin
aac540b02a8bae20e2ed76b7690e61c3a24bead396b016de0c92ec6160a08764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A53 5236 bytes
font_01_sfnt_off00006c17.bin
87cdc74476074ff3ebb89cdc10478a925e69723c43b8d8756188ca8a63a41323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 10132 bytes

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