Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f380667e48ae4fc…

MALICIOUS

PDF

54.2 KB Created: 2020-08-30 16:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3582fbfcf3bf32823b691aba6e886c0b SHA-1: 4fa506b2e2a6b809c621c0974522a5a6c519014a SHA-256: 6f380667e48ae4fc03d0a8776844b1d42a348e7466e1822c62df3a0b25a6caf4
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, forming a link farm. One prominent link, 'https://ttraff.me/wix?keyword=i+see+fire+sheet+music+scribd', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to manipulate search engine rankings or to lure users to malicious sites under the guise of providing sheet music resources.

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=i+see+fire+sheet+music+scribd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/18220110190.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/gogop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/keroses.pdf
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/guided_tours_of_australia_and_new_zealand.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/camera_scanner_to_apk.pdf
    • https://static.usrfiles.com/ugd/2f8cea_41709fdcd1244fedb2f785d5160fc319.pdf
    • https://static.usrfiles.com/ugd/b8c837_80b834759d2c4e9b943af6c63b8f4b64.pdf
    • https://static.usrfiles.com/ugd/a467d2_60aed08a95704be185fc4801e45dcc59.pdf
    • https://static.usrfiles.com/ugd/4dd980_1a6332dc8e9d49179d8e6cfcce0a63b8.pdf
    • https://static.usrfiles.com/ugd/696b8a_bf60aa4ae4d24ae592961651d5f38411.pdf
    • https://cdn.shopify.com/s/files/1/0429/0556/7398/files/brazil_food_guide.pdf
    • https://cdn.shopify.com/s/files/1/0462/3545/1543/files/73222586148.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/15987410592.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008934.bin
53f5e53ac127efdbb76d179e92ef71f306f96d25094e05d3359da73d841b6aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8934 4760 bytes
font_01_sfnt_off00009954.bin
38a3d6aac0a7d20d599bfb64f78c781e1854c035b7855c84c3fd684051fc2663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9954 10772 bytes
font_02_sfnt_off0000bdb7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB7 4324 bytes

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