Malicious PDF — malware analysis report

Static analysis result for SHA-256 05490d8761b7e615…

MALICIOUS

PDF

43.7 KB Created: 2020-09-03 06:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e71cc89f52151f5e9b046627245765f SHA-1: ade3c431a65b6a89486792d799ceccd52e39e0ab SHA-256: 05490d8761b7e615f39e4019751e5704bacaca9ed12d572f7be0d9f99ed0bf99
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. The document body also contains this URL, suggesting an attempt to trick the user into visiting a malicious site disguised as a guitar studio resource. The presence of a large number of external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO manipulation tactic, potentially to obscure the malicious redirector.

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.me/wix?keyword=cakewalk+guitar+studio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/buku_standar_akreditasi_rumah_sakit_terbaru_versi_jci.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/rofirawebagafubeladumeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/luwijodonitonixibimam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5068/files/7745659189.pdf
    • https://cdn.shopify.com/s/files/1/0457/8705/4246/files/author_worksheets_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/48863110245.pdf
    • https://cdn.shopify.com/s/files/1/0464/6171/4584/files/behind_enemy_lines_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/96501970178.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/apocalypse_magic_of_skyrim.pdf
    • https://static.usrfiles.com/ugd/04e6f9_3080ebf2714b488a881eccc0e7d7c46e.pdf
    • https://static.usrfiles.com/ugd/89c6ad_8be5008c008d407ab4108b8a2767d990.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d77500cd1d46fa8b209575995d7c32.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d47a91b14d43c08ea441775ec92836.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_off00006acf.bin
6da9da79f8d0b61877f3ad9b05eba0f8bff41051a5c4c874d224dd463ac284a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACF 5052 bytes
font_01_sfnt_off00007c21.bin
d35393af66c03f2a3218b85b990569399cd3aae6fc31c5c1284a1f204a621d26
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 11268 bytes