Malicious PDF — malware analysis report

Static analysis result for SHA-256 67aba3d4f23c4b47…

MALICIOUS

PDF

45.7 KB Created: 2020-08-16 22:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49522255371713955794ab875ea62f2a SHA-1: e7f7ba4d28620c3ce651a0c8aa1ad6614318c3f4 SHA-256: 67aba3d4f23c4b4790545cb0bacc385545fb0666d5e830d6fe50ac24064ac8d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body text is obfuscated and contains the malicious URL, further supporting the malicious intent.

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.com/pify?keyword=us+fda+gmp+guidelines
    • http://lotujof.stonegatekilleen.com/uploads/1/3/1/6/131606490/8c4fc9922eda289.pdf
    • http://files.meownisland.com/uploads/1/3/1/6/131636655/89e592a39.pdf
    • http://tesar.veingoods.com/uploads/1/3/2/8/132814050/luralolu_fepalemejeza.pdf
    • http://files.longosfinancialmarket.com/uploads/1/3/2/7/132710704/b3a8520aa3b2c.pdf
    • http://files.seewhy.info/uploads/1/3/1/3/131381374/7598578.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/95019159724.pdf
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/bidalirufufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/7128910296.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/62630178998.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/fagegaxapezinabom.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1561/files/how_big_is_dauntless_pc.pdf
    • https://cdn.shopify.com/s/files/1/0447/7508/0087/files/59637337571.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/ielts_writing_task_2_samples_academic_band_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/9919/3501/files/30505128709.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e0.bin
2be28aa25fa640a69134762817467360a23a15ad7795acea156029dc7f8f6a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E0 5256 bytes
font_01_sfnt_off000086b9.bin
81d9ca2ce9b3667aaceff98ea4e73d5175276a557a79dd2aef097ec9ae749348
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B9 10452 bytes