Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3ca6ee11935f9b…

MALICIOUS

PDF

48.4 KB Created: 2020-09-13 03:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00bbc364a78e18e3641f80cc8994a2f6 SHA-1: b2a15da7e31a6a889bd35d6ba6afa3a0e5c94397 SHA-256: cd3ca6ee11935f9b0cdb551f1816f6480d57a7777eb0062e1b28d7657d151dce
150 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, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=fsa+algebra+1+eoc+review+packet+statistics+probability+and+number+system'. This indicates the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=fsa+algebra+1+eoc+review+packet+statistics+probability+and+number+system
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/are_the_spore_servers_down.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/sap_bronkopneumonia_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/mikimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/partners_in_performance.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/10220636726.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/5764918650.pdf
    • https://cdn.shopify.com/s/files/1/0435/9654/6216/files/search_inside_windows.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/semuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/excellent_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/adjective_phrases_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/fepabumevizerakobawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/sipuxidejowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5816/6949/files/tuzowasedob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4012/files/ap_calculus_bc_free_response_answers.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_off0000731c.bin
8c168bc2c6bef4c7efeba1e2cdbb67cc46c1248859c2cc1c076c07d08e0e09ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 5856 bytes
font_01_sfnt_off0000871c.bin
fde99b3275d705ef02b0f892057ec8c88cc29236da46970ee7a401dc0388d36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871C 14280 bytes

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