Malicious PDF — malware analysis report

Static analysis result for SHA-256 539059e3a54789fd…

MALICIOUS

PDF

52.6 KB Created: 2020-08-29 11:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f98c4fc35001f5ef211a747c231e0942 SHA-1: a59f4b229c08d98d06b9616dd8dd28bdc1383310 SHA-256: 539059e3a54789fd53feebb8d984052ac1a5b3a7999420cf48c1f1718227cd7c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains, forming a link farm. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=significado+dos+nomes'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary redirector URL and several Shopify URLs, suggesting a lure to external content. The overall pattern indicates a phishing or redirection attempt to a malicious site.

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.cc/wix?keyword=significado+dos+nomes
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/nubewawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/native_american_flute_christmas_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/6057/3846/files/onn_wireless_keyboard_ona11ho087_driver.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/87571279967.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/dozozesojejolobedoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/elapsed_time_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/avon_catalogue_may_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/35522921596.pdf
    • https://cdn.shopify.com/s/files/1/0430/6868/6497/files/67126604127.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/chamakam_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/37022323852.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/80760930734.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/37913394756.pdf
    • https://cdn.shopify.com/s/files/1/0435/3005/9940/files/android_version_names.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/periodic_table_song_lyrics_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c96.bin
b2fad8b87c746b6d31dc419f2d0242c4429e9b539fd00fa83ae3cd226586bb00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C96 5316 bytes
font_01_sfnt_off00007e8b.bin
f5a3e0886b95c9b467f99b5e94d28133f575fbf2270330b68ad91cfe8bde1cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 1884 bytes
font_02_sfnt_off000087a9.bin
52c77603d89010c0f872787f8dd4a4b30260166b39ae1d5080d549892cf17264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A9 12696 bytes
font_03_sfnt_off0000ae47.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE47 16164 bytes

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