Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ea633060fd7c49…

MALICIOUS

PDF

49.4 KB Created: 2020-08-23 21:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baee6a0bf79cc71d102e6af8b4a6bf0a SHA-1: 5677163da94234a77ff050188a7ef15aa847cab7 SHA-256: 62ea633060fd7c49bf7b8032c9d178dbd6b5487e4ceb72c12c7562bce9b1c770
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious behavior by acting as a link farm, embedding numerous external links designed to redirect users to potentially harmful content. The primary redirector URL identified is https://ttraff.com/pify?keyword=alamein+line+timetable+pdf. The ML classifier strongly indicated maliciousness, and the presence of a large number of external PDF links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=alamein+line+timetable+pdf
    • http://files.kghousingcoop.ca/uploads/1/3/1/4/131437443/gekarem-dulunuka.pdf
    • http://bubug.thetravellingmathsteacher.com/uploads/1/3/1/8/131871433/nalodadoti-wedipufom-supivaxit-gotetit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/64152517912.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/netaropaxaderaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8665/8213/files/16956132743.pdf
    • https://cdn.shopify.com/s/files/1/0447/9621/5456/files/call_od_duty_4_key_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/arranged_by_nelson_riddle.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/jazajawumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/76169713872.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/fakebook_template_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2539/9971/files/wedding_dj_contract.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f8c.bin
de147c0531c8ff08ce7cee728fac712f54e1e3babeff7c3c63bcd15d8bbc1684
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 5040 bytes
font_01_sfnt_off0000809d.bin
fff589c301f0bb20eca3df450c50105ccf7d871e73457aa29361f374eb344976
pdf-font-stream PDF embedded font (sfnt) at offset 0x809D 10096 bytes
font_02_sfnt_off0000a368.bin
0a707c1fa9ec258139657396bf8aea7b1acfb93ff2adac3029491de4656f0279
pdf-font-stream PDF embedded font (sfnt) at offset 0xA368 16260 bytes