Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c36258cb8cca19a…

MALICIOUS

PDF

38.3 KB Created: 2020-09-05 15:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 63247c022461dbb3aba34c216d93086b SHA-1: e14f9b88c8bb47ac46849c15eeeb2edecaea27b3 SHA-256: 8c36258cb8cca19a6d8f9f3f7138095f84a07da693bc589730493eccd4585e39
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.club/pify?keyword=vimanam+movie+song+ringtone. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to obscure the final destination or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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.club/pify?keyword=vimanam+movie+song+ringtone 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/4479ed_5f6dbb2456fd4caa8ca163ccc3d014cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4d6844_7fa5f5c9a9e440ab80b2dd3473f706e3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1c55765bbe5749f695c7ef89e18e9ac8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/73c254_a7b79e38f0a04333a62c49a8089e466f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c79b1c_745829baa4814de0a5dddcd6265d6d71.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3439/4276/files/25633937590.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6260fe_f7014fc9c74c4620b71b084c086dcaf4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b0488c9653454262809efc29948d737d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/48d9a1_23e522211c7e4de78454a7bf1e053b2c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/432b07_d31606328a274cf5beaaf9eb20f4ea90.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/575fb0_1f0aabada030457aacec8f39c324af67.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6980/0597/files/netosepibivekakimijixipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/declaration_of_interest_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/katikew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/jaxafejokes.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A04 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00005aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB 5000 bytes
SHA-256: 91834a94a07fb76a380f05245b3197d25ff1d7c2b2f8575ca5c8e696c2be692a
font_02_sfnt_off00006bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDD 9444 bytes
SHA-256: bc7434e7e9f4d86250ac8bb22383e94d554d606fdc1bf7d9e4d9af0cbc9aa9ca

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