Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6501834abe312b…

MALICIOUS

PDF

37.4 KB Created: 2020-07-23 16:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: ffdca6e073c5ea08d81f19ecd6dda10b SHA-1: e53ed83f96a9fdeafe76b02435a3adac1ccc1b6b SHA-256: ea6501834abe312ba706b4cecfd41d64ad2cf505c21df2d439c998442a2881f5
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary URL leads to a redirector that appears to be part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple Shopify-hosted PDF links, some confirmed benign and others unknown, suggests an attempt to blend malicious content with seemingly legitimate resources.

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.cc/wb?keyword=vitamins%20and%20minerals%20demystified%20pdf In PDF document text
    • http://files.ksah.com.au/uploads/1/3/0/7/130775747/tosefege-mijowud-lotusakipugizad.pdfIn PDF document text
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdfIn PDF document text
    • http://files.lesliepetersonsapp.com/uploads/1/3/2/7/132740747/kukeni-junamunokeligaf.pdfIn PDF document text
    • http://files.kdhodges.com/uploads/1/3/2/7/132740321/5360778.pdfIn PDF document text
    • http://files.friendsofhastingscountrypark.org/uploads/1/3/0/7/130739366/bevapejilu.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/1/0429/8565/2375/files/73965634741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/xulasarefexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/10488219752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/17863581091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/pokawufezomaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/bavorunarojaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/gevukopekoniramelinoxipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/6172285624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/36266398970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/gujijoliwido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/pupesibixumejor.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_off00005762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5762 4932 bytes
SHA-256: b65e148151f5815724eee1aea666038395e6299bf4751c0fad46660928a79586
font_01_sfnt_off0000680a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680A 9368 bytes
SHA-256: 4abe8eef977ba7670b612024321f5f3a313979dc2022da781eafc9628a9204bd

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