Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b47e7cc0ca58ca7…

MALICIOUS

PDF

51.8 KB Created: 2020-08-13 04:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0ed1b0ada1e500a6c2448fab2b847c SHA-1: fbe6199afa5243f0c7d50e688e5755a89ffe25d6 SHA-256: 5b47e7cc0ca58ca7e992142a3ba10a3e06fd3d6e43666a138c0f4b4c87172387
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to direct users to harmful content. The document body, though partially corrupted, contains text that appears to be a lure for a "2018 goldwing navigation manual", likely intended to trick users into clicking the malicious links.

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=2018%20goldwing%20navigation%20manual
    • http://files.hansvercauteren.com/uploads/1/3/1/4/131453198/64426dbf2f22.pdf
    • http://murujekun.ifafrog.com/uploads/1/3/2/6/132680813/ac78bf56fa08.pdf
    • http://files.parashantiyoga.com/uploads/1/3/0/8/130814717/8309057.pdf
    • http://xafoju.3counties.info/uploads/1/3/2/6/132695569/9592009.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/certificado_antecedentes_judiciales_policia.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/wopunewamufikaduzamifolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67062005494.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/sajononusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5285/0586/files/xufodezagif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4443/files/juzoxesomasezamabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/16965125815.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/remajebewigajezupuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/oral_myiasis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/allahabad_university_b_ed_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/25326113115.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0793/files/wareromoluxutuwutolifel.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_off00008b72.bin
7db9089361484f3690578f3e33cadb665438d1aa29b91a8e954f1c296de9953d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 5448 bytes
font_01_sfnt_off00009df3.bin
4df1f22a53c7ce2e1b6b06386edc560077ce3740e6512b5cc9ad7613735c5697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF3 10608 bytes

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