Malicious PDF — malware analysis report

Static analysis result for SHA-256 82912f047184609b…

MALICIOUS

PDF

134.6 KB Created: 2020-08-02 19:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab8eb428baa7b57335f59efa8c77e648 SHA-1: 7f593fac0e14e756ed4605d69766332d5f829751 SHA-256: 82912f047184609b460df232d817ccec4207968152b2f99259e4588ea4ebd501
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=control+systems+engineering+7th+edition+solution+pdf', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=control+systems+engineering+7th+edition+solution+pdf
    • http://files.arhstyles.com/uploads/1/3/1/4/131437333/kowuwexili-fasusulizi.pdf
    • http://files.earthfloridajax.com/uploads/1/3/0/7/130740017/zilipo.pdf
    • http://files.wcsuticklab.com/uploads/1/3/1/4/131454696/1498399.pdf
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/jokotexorezal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/xiwozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/witonuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/kopovovumuvuxojotevokus.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/pixubepafipuxop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/xadiwimexomanemixigewini.pdf
    • https://cdn.shopify.com/s/files/1/0434/4718/9670/files/d_d_rope_of_climbing.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9521/files/osrs_amethyst_broad_bolts.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/58244014016.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/kaxekamur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/91693060889.pdf
    • https://cdn.shopify.com/s/files/1/0439/2799/4523/files/16119867317.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_off0001ab6a.bin
e46a2820fdee3548016d4f230348d4bd2b48c903cacbb7e8f68caeb17ae006f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB6A 5332 bytes
font_01_sfnt_off0001bd6f.bin
994c956161645f535f8dfd301c49a7165706c8405aafcc79913a88cad3caeb19
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD6F 17888 bytes
font_02_sfnt_off0001f4d3.bin
6580be786b1a6bd4ddd2f852bbdf6b53fd69956994b53efbb1ef70aafa5b84ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4D3 16692 bytes