Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cf31cb14b3e7b8…

MALICIOUS

PDF

46.9 KB Created: 2020-08-05 17:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92010e9190205264697b10561163fe92 SHA-1: cc35b0ca0540a19ecae4ec1bcb2b611230dfdb33 SHA-256: 43cf31cb14b3e7b85c5a1667d036515cef46b1246b1cc4c8273f64150a787e4c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL that impersonates a free software download. The document body also contains this URL and other links, reinforcing the lure. The presence of numerous embedded links, many hosted on cdn.shopify.com, suggests a link farm designed to improve search engine ranking for malicious or unwanted content. No scripts were extracted from this sample.

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/wb?keyword=dopdf%20free%20download%20for%20windows%2010
    • http://files.sarahwood.com/uploads/1/3/0/8/130814101/6588006.pdf
    • http://files.morocco.ency-education.com/uploads/1/3/0/7/130738806/5847bdc.pdf
    • http://files.bibisnelderwaardbrion.com/uploads/1/3/1/1/131163943/gifole_kibodifegezidod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/32251794363.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/71291352954.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/ratolotidomikapidimiben.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/zovumu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/xitunalefidesomaxomulutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3824/3996/files/anthropology_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/3822/0181/files/97953000477.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/fitapemanat.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/18765072991.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/poragozixoluvofadabigo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/fimoru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b8.bin
943bae65316541c38adf9b453275ba86c8514805b03e5dd5d7be09778c606e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 5320 bytes
font_01_sfnt_off000074ed.bin
36c1ebfe3ac363e18b1dbd1acf8c9f1daf4548c6cbd131357ffcdda75f6f9e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74ED 7860 bytes
font_02_sfnt_off00008ab5.bin
8210f48c9ddb473a8f20943f3f7939bbd0c3720c88084065da2178d6ac17c253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB5 10304 bytes

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