Malicious PDF — malware analysis report

Static analysis result for SHA-256 0484bef751dbb03e…

MALICIOUS

PDF

40.2 KB Created: 2020-08-22 08:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e612e41d139a36e98d8641be2ad2a9be SHA-1: c1bf35d6d42182dcc8e3d0ab4917d184001804f9 SHA-256: 0484bef751dbb03e6162dbbf41d616ccf83f915d8124f50ef6eab814a5492766
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to a link farm designed to boost SEO. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to potentially 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.com/pify?keyword=annual+report+design+template+word
    • http://files.brookhavenmonument.com/uploads/1/3/0/7/130775972/mutuzugitoja.pdf
    • http://files.bridgeportrodandgunny.com/uploads/1/3/1/1/131163737/ditixip-romekoxazotuzob-riwexeribezejad.pdf
    • http://files.pamelasosnowski.com/uploads/1/3/0/7/130739831/fasorubo.pdf
    • http://files.witskenlandscaping.com/uploads/1/3/0/8/130874359/bijof_dodizedod.pdf
    • http://fesegad.ianjamescarr.com/uploads/1/3/2/6/132680835/8609f782.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/bootstrap_4_form_validation_without_submit.pdf
    • https://cdn.shopify.com/s/files/1/0461/8348/1507/files/adobe_acrobat_reader_9._1_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/70892734655.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/kudafik.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/wilogabamosuwedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/abnormalities_of_placenta.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/9775006202.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/23942629853.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/multivariate_data_analysis_in_practice_esbensen.pdf
    • https://cdn.shopify.com/s/files/1/0464/7121/7320/files/infomercial_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/80850067785.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/nasurefunojuvugu.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_off00005f71.bin
341b2af1f7a47cc2547bb71c4e77e94e1e040b753b7bef17340aeb51fa46fe46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 5360 bytes
font_01_sfnt_off0000719b.bin
fe1c758b670d8b63159ffaf650b520c7adef9d1745dc138d70f36766165e8b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 9900 bytes

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