Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd04a040ad92d3b…

MALICIOUS

PDF

48.1 KB Created: 2020-07-18 22:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e940622b3551fd48b1f36b9c7fe939e5 SHA-1: 78df940eddc11a217170652db267e7a2cf08ce6f SHA-256: cdd04a040ad92d3bcd834212f8d9adf4f82ac26a05b891af1a062978bbbb01de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to link farms designed to manipulate search engine results. One prominent link redirects to a known malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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.ru/wb?keyword=hayward%20robotic%20pool%20cleaner%20manual
    • http://files.foustequine.com/uploads/1/3/0/7/130776755/naresopenotafazimed.pdf
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • http://files.bunyiphotelcavendish.com/uploads/1/3/0/8/130814735/2ad4d91d27.pdf
    • http://files.southernoiltransport.com/uploads/1/3/0/7/130775363/1852129.pdf
    • http://files.audaciouslifestyle.com/uploads/1/3/0/7/130738621/xusamagowes-suvixap-sabumisisinezo-zogabuvapafu.pdf
    • http://files.audaciouslifestyle.c
    • https://kidugusex.files.wordpress.com/2020/06/durajefid.pdf
    • https://namuvese.files.wordpress.com/2020/07/jepukajuroji.pdf
    • https://pevoruzon.files.wordpress.com/2020/07/20065048546.pdf
    • https://lugolasef.files.wordpress.com/2020/07/45184637927.pdf
    • https://sanadaxime.files.wordpress.com/2020/07/41292365798.pdf
    • https://mubaniwi.files.wordpress.com/2020/07/57212771922.pdf
    • https://kolusivip.files.wordpress.com/2020/06/93059886332.pdf
    • https://fulevomu.files.wordpress.com/2020/07/zemogijezepanuranaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/pamak.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/37285010143.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/33941667969.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/55617939615.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/9040609484.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2325/files/namibewise.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/juzifemuju.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/5669607256.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007549.bin
b900032a14d7c61bfaed5410e6abc1e551edc53f1ed31c43c510244b6c418c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 5216 bytes
font_01_sfnt_off000086f5.bin
fc89862a44ae410a5d91fc0419ef385b52f5904de512162e2379a3f1ba6c7b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F5 13972 bytes

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