Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af66c6ff1d32662…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 10:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a58fbc5fb918c08425826435cbb983f SHA-1: 10f1cd1b89b23432f55d4ff3dec2b370f5fe6dac SHA-256: 5af66c6ff1d326621dc66493ef52ceac64275fb2ad5fc7d849ef9d85e0205a2c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a password archive lure heuristic suggests this PDF is part of a multi-stage attack, likely intended to bypass initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=better+half+song+ringtone
    • http://files.eatatheritage.co.uk/uploads/1/3/2/3/132303312/tokobo-luwadi-xixofaxab.pdf
    • http://files.kickcyberbullying.com/uploads/1/3/1/3/131380354/rozukegalavin-pimijade-malalepe-sowetirata.pdf
    • http://rilag.steadfastleaders.org/uploads/1/3/2/8/132815806/6310961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/90169233766.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/nidesosesirusepeboso.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/odisha_song_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/fosigel.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/33651564317.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/54035953755.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/55777720578.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/descriptive_text_example.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/57491606004.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/bewitched_bothered_and_bewildered_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0742/files/synonym_for_savior.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f5e.bin
959723a93fcfb959df8cb16d615c569f5c961ee4f896a0af93f5e30bf773647d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5E 5076 bytes
font_01_sfnt_off000070a1.bin
6459ac1a74407f364f81d5503ef351c4af5c0b218632303d5cc59348dc55a98b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 10460 bytes

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