Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ed04dc9c8a0dce…

MALICIOUS

PDF

40.5 KB Created: 2020-09-06 05:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5569ba9f5f2b836aaa373aaeff28ae8 SHA-1: 91b33c9ad90758e666fec8c406a4d83994ccdb60 SHA-256: c5ed04dc9c8a0dcee2b12f1223827ad684b534a1c36dca7587cadf75d3ec3294
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL is https://ttraff.club/wix?keyword=learn+bass+guitar+scales+pdf, which likely leads to a malicious payload or phishing site. The document body, though heavily corrupted, contains references to the same malicious URL and benign URLs, suggesting a lure to a malicious site disguised as educational content.

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=learn+bass+guitar+scales+pdf
    • https://static.usrfiles.com/ugd/a298ce_09d33dcd41bb4981a80ead7622caa682.pdf
    • https://static.usrfiles.com/ugd/f0e51d_a89e8e2434d14ca68048f4485ef7aa80.pdf
    • https://static.usrfiles.com/ugd/271e65_453f451ebe9d416984e59a2a8192462a.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/54410347821.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/29116735089.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/zufusoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fapodepemiretewuroraga.pdf
    • https://static.usrfiles.com/ugd/b8c837_bec6339463554b088c11928945fb956a.pdf
    • https://static.usrfiles.com/ugd/253000_c4634cab2de04011a65fd12a88c81b34.pdf
    • https://static.usrfiles.com/ugd/8cbfce_94fce2f9d190423db363e0d41c6b0f2e.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/96270954807.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/lozoxusejuxategovuzovo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/numuzix.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/beyond_the_sky_subtitle.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/hallelujah_from_shrek_piano_sheet_music.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_off00005f80.bin
b2ccdc7007419c7a68ea18ff1333b454bc66214e57d7d82dde500f098de4d344
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F80 5404 bytes
font_01_sfnt_off000071ef.bin
09fa6848749a221adb48d70bd32412ec5e696a6ad6b50d597a49e7fbf2acc295
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 10804 bytes