Malicious PDF — malware analysis report

Static analysis result for SHA-256 d517c12f679f760b…

MALICIOUS

PDF

53.0 KB Created: 2020-07-24 08:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 80152b995407bd415794b331922ae467 SHA-1: 4a2285c79c3604ddefcbb8d2c6cbfbb28429fa3e SHA-256: d517c12f679f760b7516806c8e374bc3712c79fc82934c180ea67443cbd1c7cb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. Additionally, it hosts a large number of SEO-optimized PDF links, many pointing to external sites, suggesting a link farm or content manipulation tactic. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea of a web-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=manual%20hand%20pump%20water%20well In PDF document text
    • http://files.taghmonns.com/uploads/1/3/0/7/130775228/4743028.pdfIn PDF document text
    • http://files.abasistuff.com/uploads/1/3/1/1/131164383/bupulapexu_wasat_sazowopetiraded_nejidisugoxu.pdfIn PDF document text
    • http://files.stlvacancy.com/uploads/1/3/2/7/132740253/5038402.pdfIn PDF document text
    • http://files.myartyouwearjewelry.com/uploads/1/3/1/4/131453539/kukuxubuv-lugarugixarafod-vabojudu-wadonuzuzu.pdfIn PDF document text
    • http://files.mariposaband.com/uploads/1/3/1/6/131636914/6233857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/5828649586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/goriverati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20807514836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/fagenadadojofesanuwibabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/pevulipexem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/31251288460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/48884525796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/giboduzid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/41177047113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/mepeni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D6 4840 bytes
SHA-256: 80ddd5a9a8a2ffcf40458dca6d7222cecfe39df8bbfc856052e8c92059c32dda
font_01_sfnt_off0000a31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA31D 10564 bytes
SHA-256: 07a5dc929405bc5aba1429b634906c045719a0ccf0b0862e3c17af4cf7be7999

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