Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a1de2850ee2c79…

MALICIOUS

PDF

54.0 KB Created: 2020-08-22 10:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ece99fd5121a4f11e7c8710c0605a61 SHA-1: 1096a91674bfa9da4bec9532bc669d29622ff213 SHA-256: c4a1de2850ee2c797c06a8a8ca787bf34ceb094513143437ef5bdf03f3d7c7a3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains the text 'Angular 4 form validation on change' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links also indicates a link farm strategy. The primary malicious IOC is the redirector URL.

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=angular+4+form+validation+on+change
    • http://files.keribaskin.com/uploads/1/3/1/4/131454355/3071001.pdf
    • http://bizadulix.roastinghousemcgregor.com/uploads/1/3/2/6/132681670/nomamenus-xanabo-duwuveroza-nosebupul.pdf
    • http://files.thebrightestday.net/uploads/1/3/1/1/131163960/luzoxebolog.pdf
    • http://files.justiceformajortillery.org/uploads/1/3/1/3/131382470/deduvitorovara_kadoruxuzujeto.pdf
    • http://rozoru.oakdalemma.com/uploads/1/3/1/4/131406947/kosajawiliso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/58338053223.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/potanufak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36920421444.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2964/files/new_hd_movies_telugu_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/fuzebelinefunefiwuxuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/37736076178.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/jusawijozavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/gezasapiralebesimegugujez.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/83138024921.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/fokigizune.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/kozoduv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a29.bin
c597bc364ba3ab90f75c0beb1481ec10b91b74bd9a8b19e150af33d0ebc9bf76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 5276 bytes
font_01_sfnt_off00007bee.bin
6f3287a829aa2e52dba162faf23c37ec22e1cc963ebb1f9c8c94c81e8483fa8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEE 3368 bytes
font_02_sfnt_off00008983.bin
2f2e77b401686aff7db05621ebc6332d6ba9d171ec8c0abe15d01191ac4c57a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 15528 bytes
font_03_sfnt_off0000ba92.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA92 4324 bytes

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