Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3d422c0737b7e4…

MALICIOUS

PDF

43.6 KB Created: 2020-08-10 17:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e80fa41338ff17ba64811c242ab7fa7 SHA-1: 4810f6033f0733e6ddb19f6dda8bf7a8152ac992 SHA-256: 3c3d422c0737b7e499ec18f1f3abe5638238d8baf95cb4c29359bebdcb2d3c43
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a link farm designed to appear as search results for a popular textbook, but the primary link redirects to a malicious domain. This technique is often used to lure victims into downloading further malware or visiting phishing sites. The embedded URLs suggest a social engineering tactic to disguise malicious redirection.

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=harsh+mohan+textbook+of+pathology+8th+edition+pdf+download
    • http://files.chenowethbairddesign.com/uploads/1/3/1/8/131871894/kawal_fudomur.pdf
    • http://files.shariedavis.com/uploads/1/3/0/7/130739288/xeriso-gubukare-xejeg-nevunamuvati.pdf
    • http://files.jameswolverton.com/uploads/1/3/1/3/131383771/8821067.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/arabic_alphabet_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/maharashtra_state_board_biology_textbook_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/19066760365.pdf
    • https://cdn.shopify.com/s/files/1/0433/3446/7752/files/sejijane.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/51570730715.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/94674113650.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/wavovemozano.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/accuweather_in_newark_de_19711.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/91517980004.pdf
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/91366568943.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_off00006938.bin
ca1260a3a260ef27b9fae0757513e1c140155907fb972187e62feff7f008a70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6938 6076 bytes
font_01_sfnt_off00007dd2.bin
3c77cceb942cd6eba12d09d12202d225db618f0c6f2ebf7c6306933946477b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD2 10708 bytes

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