Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce85dcd17a4ae6c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-07 13:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f55cd94e0e955a775e321645d3f42c90 SHA-1: cdffdf06f4244ce78bd13efaea8948a68e62f9df SHA-256: 5ce85dcd17a4ae6c624a388773a4b9168a469d9396439ddaaac50de62468f273
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=camino+island+pdf+download'. It also exhibits characteristics of a PDF link farm, containing numerous links to other PDFs, many hosted on Shopify. The presence of a 'download button' lure further supports the malicious intent. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDF files, indicating a campaign to distribute malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=camino+island+pdf+download
    • http://files.shearserenitysalon.com/uploads/1/3/1/3/131383553/53b9878d6b0f11.pdf
    • http://files.thorsonpto.org/uploads/1/3/0/7/130738673/3274070.pdf
    • http://files.jenniferamell.com/uploads/1/3/0/7/130739470/bogilal-kasibeguw.pdf
    • http://files.jennifergrayphd.com/uploads/1/3/1/4/131437117/sojilufelukib.pdf
    • http://files.palmandbowl.co.uk/uploads/1/3/0/7/130776460/7973499.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8688/8612/files/turiteg.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/wekukeguxefoxedosoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7640/files/deneserulikivebojogomone.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/24715344175.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/pukujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/favidiwuzubujitekase.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/dark_cloud_2_spheda.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/totalq_business_plan_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/38681109948.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/dixazatal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/railway_alp_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/68478061607.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/surekowabugak.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/alteraciones_cromosomicas_numericas.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_off00006b09.bin
379bb43fd8e92f5d5e89ab4114ee7b321a23616e72293d4dd74caf5d9793819f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 5088 bytes
font_01_sfnt_off00007c4e.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 1800 bytes
font_02_sfnt_off000084dc.bin
bcc88fe05a05796765a5548457ec837e2558d516a1e7403eb8bfdc5d94b4fe9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DC 10428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.