Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c14e1c78bd1e2a…

MALICIOUS

PDF

69.3 KB Created: 2020-09-06 00:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 571b4b240a92aa4987e9657b086ffb4d SHA-1: cf00508f851b71998b412fbc138324b7c533a983 SHA-256: 99c14e1c78bd1e2a0a540b25a643f13035fb11f03f5cb3d0bb6d4d81e6ceec2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a cooling tower project report. This suggests a phishing attempt to redirect users to malicious content. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cooling+tower+project+report+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/912de2_aa55f6a952db46269e533aa59dd4a070.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4e6dd5_7e6a892007f140e9953c616f17670e86.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/762c1a_46b7d487e3594a77b08df11e1b531292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/hsc_marksheet_2019_sylhet_board.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/73998852622.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4f6f0_d0325c4d93b9421cbea9258b0222ab22.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_823f16bd4e6a43ed96410974cb865342.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4fb05f_faefb78987a5467cbcd37efe2fd2cbd5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9344/2208/files/uk_parliamentary_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/concurso_aeronautica_formao_de_sargentos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/nevuvimunejopijafazafizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7988/4195/files/sedusetawilasowepes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6545/1163/files/kiwotata.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 5008 bytes
SHA-256: 4d0df9c79121c5a7b086a532c04d4772a3b4e08f81eb1842221cb5e90fb8b6be
font_01_sfnt_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 10536 bytes
SHA-256: b3b0e1a7f31d91f5f1c3cab14f0821ec5f4b11b225e60e2d42c7bcca51c2c624

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