Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ab460575c15db6…

MALICIOUS

PDF

38.1 KB Created: 2020-09-18 13:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b524e7fbbfcba07cd7f4026ff8d39d SHA-1: a46853960053194f90204ff65b78d5fc2ad908e2 SHA-256: 66ab460575c15db64bafc51e93110668b11471db5f9fd99aa49c1ff95c3d6486
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure. The document body, though partially corrupted, contains the phrase 'Thank you for the notice in spanish' and repeats the malicious URL, suggesting a lure to external 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.me/wix?keyword=thank+you+for+the+notice+in+spanish
    • http://files.1lonerider.com/uploads/1/3/0/9/130969054/lewumerisubem.pdf
    • http://files.henryleebarbershop.net/uploads/1/3/1/4/131408899/sogejaxe.pdf
    • http://fufun.dorieisenstat.com/uploads/1/3/1/0/131070450/kotinuxonaregonuk.pdf
    • http://files.peculiaritypress.com/uploads/1/3/0/7/130740044/e21756.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3521/3479/files/rerafotizan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/novakuvuzurikubax.pdf
    • https://cdn.shopify.com/s/files/1/0450/9266/7544/files/sosedulalilesotonobiwimep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/2264261599.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/aeronautical_engineering_subjects_list.pdf
    • https://8259d84d-246a-49c1-a0f8-d745516f3509.filesusr.com/ugd/02beb7_8875c825c8804863985db50a36a1ccd5.pdf?index=true
    • https://bdb26303-795b-42bb-8b26-c88a16b42170.filesusr.com/ugd/1e52da_a3cec294a23f441b91f700d24026f2b2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/66497623815.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/factorio_productivity_module.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/kartarpur_weather_report.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_off00004d17.bin
28a4fce2ae36ca78cddff3834e3aa230ffd42053511c887ad2b84da870b1753c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D17 5068 bytes
font_01_sfnt_off00005e54.bin
b5122f36adc3ef6de0b4b12ffdc960e8f7ae02c7b461a58dba242f74c9865a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 9148 bytes
font_02_sfnt_off00007d7c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7C 4324 bytes

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