Malicious PDF — malware analysis report

Static analysis result for SHA-256 06512fbcdca0ca85…

MALICIOUS

PDF

61.7 KB Created: 2020-08-06 06:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8d0cf9802cdf8a58c34d05e9edb3fa SHA-1: 3211a6c8264623c07ccceef8e72b499ae79b0084 SHA-256: 06512fbcdca0ca85bc0335ba1914eb69ae634628a6580978b494d47256fb9a31
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 external PDF files, forming a link farm. One of the primary links directs to a known malicious redirector infrastructure. This suggests the document is designed to drive traffic to malicious sites, likely for further exploitation or phishing.

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=cestodes+and+trematodes+pdf
    • http://files.inharmonymontclair.org/uploads/1/3/1/3/131379213/5530379.pdf
    • http://files.beautifulroomsinluton.co.uk/uploads/1/3/0/7/130740504/1514287.pdf
    • http://files.stator-creative.com/uploads/1/3/2/6/132696465/8e2f2f5e.pdf
    • http://files.cbakerpaintings.com/uploads/1/3/0/7/130739344/laperolarojavuv-tijitagidid.pdf
    • http://doritudek.onsighteyecare.co.uk/uploads/1/3/1/4/131406592/polasa-sogutusotik-xotirozifolutur-zomurasuduvos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/lightning_thief_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2584/files/6920847556.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/zikitetijakepilexawetizo.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/administrao_de_varejo_para_pequenas_e_mdias_empresas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/kotona.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/97696557580.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/16097976462.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/15311899372.pdf
    • https://cdn.shopify.com/s/files/1/0432/6640/8603/files/24213680657.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/98616614784.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/juzevo.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_off0000a3cb.bin
75307725df7bb0749f0e3da798874336595a78fa7a99f7958258d7dd46dfe86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3CB 5060 bytes
font_01_sfnt_off0000b4dd.bin
7775e8e7c4329a1c5bd112c001158d8940360085fc48f9208aadc231de0e3d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DD 1716 bytes
font_02_sfnt_off0000bd84.bin
0c470b3e9f24fd0c2f1309ef337e45e103caf7867667dd478ec4fe8f0df6d5f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD84 14148 bytes

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