Malicious PDF — malware analysis report

Static analysis result for SHA-256 19533a39d7695a7a…

MALICIOUS

PDF

37.6 KB Created: 2020-07-18 05:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 100486f856e1c68597555a010639cde0 SHA-1: 339890ef9de6ea69f7d702f86f74a74a896e8b78 SHA-256: 19533a39d7695a7a241e2c91687794d49fbb99cf44d7e322f8d3a80e5ef22cb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various platforms. One of these links, 'https://ttraff.ru/wb?keyword=lunario%20sentimental%20leopoldo%20lugones%20pdf', is identified as a known malicious redirector. The document's structure suggests it is part of a link farm designed to distribute malicious content or phish users.

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=lunario%20sentimental%20leopoldo%20lugones%20pdf
    • http://files.heatherseastheworld.com/uploads/1/3/1/4/131438098/getuteda.pdf
    • http://files.adobeforfashion.net/uploads/1/3/2/6/132695919/1d5642acef07444.pdf
    • http://files.coxevolab.org/uploads/1/3/1/3/131380733/b435077a189.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nikuzeveda405669889.files.wordpress.com/2020/07/11055421099.pdf
    • https://likulorasix.files.wordpress.com/2020/06/sipasorire.pdf
    • https://dowamikuju.files.wordpress.com/2020/06/dalusirepijovabela.pdf
    • https://nasibusiw.files.wordpress.com/2020/06/8467241876.pdf
    • https://norolaxuse.files.wordpress.com/2020/07/33347117596.pdf
    • https://maxagosimose.files.wordpress.com/2020/07/37664063603.pdf
    • https://lixotudus.files.wordpress.com/2020/07/zimewidomajigi.pdf
    • https://mexelovefi.files.wordpress.com/2020/06/3317200614.pdf
    • https://dozaviv.files.wordpress.com/2020/07/35584542141.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/kodefig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13336488851.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/suxulojasaxovubizowovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/1862601706.pdf
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/39650427823.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/tepovuwovabade.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/jarakerokatob.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_off0000548b.bin
ec9eea862cf8c72e7994511c0f652b65749c52ad531452b6f90fd8f16c90bc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x548B 5184 bytes
font_01_sfnt_off00006613.bin
55ec6e78c2416f640fb714385ba2216697e5e7e3432532fd5bfd8c96fc2060c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 10008 bytes

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