Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ed79510c35fbde…

MALICIOUS

PDF

33.0 KB Created: 2020-09-04 14:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c33953e5d316e83e222bc995e7ea97e SHA-1: da838dcd58cf51c1f12afa439fbfcb6d01e9c723 SHA-256: 27ed79510c35fbded68e34183ddaa028871d6e54473d2919af413f8a08d24754
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.club/wix?keyword=kadhal+kavithai+movie+songs++masstamilan, which is likely used to lure victims into clicking through to further malicious content. The document body itself contains obfuscated text and the malicious URL, reinforcing the phishing attempt.

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/wix?keyword=kadhal+kavithai+movie+songs++masstamilan
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/tiniteguwunoxopejovodared.pdf
    • https://cdn.shopify.com/s/files/1/0448/4546/5762/files/callan_method_stage_1_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0431/4811/6119/files/electric_bicycle_report.pdf
    • https://cdn.shopify.com/s/files/1/0446/9774/7612/files/after_the_fact_the_art_of_historical_detection_download.pdf
    • https://static.usrfiles.com/ugd/c33cdb_858a6064df2a409ebb56d8c02b75c833.pdf
    • https://static.usrfiles.com/ugd/9904c2_aea7fdfb5c0f4e04a9915de96e39fff8.pdf
    • https://static.usrfiles.com/ugd/b8c837_591654e411f94a9eab90d94087a75b17.pdf
    • https://static.usrfiles.com/ugd/a12125_3b21eb8e6d4b4fa489fdbaabc247db6e.pdf
    • https://static.usrfiles.com/ugd/3d7af5_c66f6b02278b41a795361c80f53bc50a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce054c7d533441bb908d312701f67b71.pdf
    • https://static.usrfiles.com/ugd/628a76_9b017e950baa4e23a3e1f0bef7917e12.pdf
    • https://static.usrfiles.com/ugd/f515ca_51c944fbb26c4a97afd68f1e76dfee8e.pdf
    • https://static.usrfiles.com/ugd/69b86f_f9db60ffea01478d8052fc96094c3d02.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044c8.bin
06b32aedef11b71e89309649ddb002e7fc7385cd47455db5d0844e236b494a7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x44C8 5236 bytes
font_01_sfnt_off0000567b.bin
e775b017782c2d1b1672b004d968b258c28c19be6ee22845db736f2dac7c559f
pdf-font-stream PDF embedded font (sfnt) at offset 0x567B 9924 bytes