Malicious PDF — malware analysis report

Static analysis result for SHA-256 3853e2b69b146561…

MALICIOUS

PDF

44.0 KB Created: 2020-09-02 09:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2925d1802a177f2480cc8779333433b7 SHA-1: bdda85d7a5804eaf79b6c32ec630c1a100e3e6fb SHA-256: 3853e2b69b146561a364b679ac420b1839575f251fbf1fa949a57fd73f135bf3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=av+script+template+word', which likely leads to a malicious payload. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious content, consistent with a phishing or malware distribution scheme.

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.com/pify?keyword=av+script+template+word In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/waweka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/cg_vidhan_sabha_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/99923340171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8757/6740/files/bujukibuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/algebra_math_minutes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/lidofisoragenutuvelitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6434/7035/files/fupem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/nekef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/223_reloading_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4349/files/1706788368.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/09273f_c414761e0ac0449fb61e8be4aec61284.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a2ebd8_7bca125202a746989840e385b1487833.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_aa221773c22547fdb89987f057ae7911.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/db93e9_261ca56fde614af780870489c1bec4ca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b7290_5cfa073742c346df8cf4f41175bb9d9a.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_off00006e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 5360 bytes
SHA-256: 5ea060e55f95d755580748899dc5911aa5aaf5727613bd92bcc7068c7dc678f1
font_01_sfnt_off00008048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 10212 bytes
SHA-256: 70b7e59e83ea3cfd15cfc2387d60ad690da9cb61094beac043e094eb73939c26

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