Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06cc17906567abd…

MALICIOUS

PDF

51.5 KB Created: 2020-08-12 06:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b017fe3a1395248a676fc99d8a43d80 SHA-1: 541b865e3597227971c194119c8c132f562bc134 SHA-256: f06cc17906567abd4c8ab713ffb418fb377514be513818e2ec0359b49d67e4f5
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the text 'Calcitonina bula pdf' and a URL that matches the malicious redirector, suggesting a lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse to improve search engine ranking for malicious 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.cc/pify?keyword=calcitonina+bula+pdf
    • http://vufonesis.stlukestally.org/uploads/1/3/1/4/131483281/b9e532481ceb.pdf
    • http://files.dvgradnight.com/uploads/1/3/0/9/130969469/bbf0a56.pdf
    • http://wozurefuf.accreditwp.com/uploads/1/3/1/0/131070382/wipugiv.pdf
    • http://files.knutsfordtennisclub.org.uk/uploads/1/3/0/8/130814769/baxunarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/animal_adaptations_worksheets_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/mojikisamewezirawof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/viliwoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/zidixuvudirete.pdf
    • https://cdn.shopify.com/s/files/1/0440/5261/1222/files/88596335426.pdf
    • https://cdn.shopify.com/s/files/1/0448/0362/1025/files/angielski_sownictwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/9018040209.pdf
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/step_by_step_ascended_master_discourses.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/lowes_dothan_al.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f42.bin
b59103cb62265860de2794a9ad59f586263c3f51cae153a20b44d942f8bdfa7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F42 4800 bytes
font_01_sfnt_off00008f95.bin
85616726b23d49e7a0c6a023343775980c968f56fbe7d1cd9bc9ae9684667b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F95 10508 bytes
font_02_sfnt_off0000b2c3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C3 4324 bytes

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