Malicious PDF — malware analysis report

Static analysis result for SHA-256 168d041a1021a1ab…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 18:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b33398d0501cfa5b1f76a5da1e43256 SHA-1: 8f055cccfb896c08fca4d52432482f06fa9e2ed4 SHA-256: 168d041a1021a1ab3019ba789168f3bb141ae390ae524057f6eada1c8bcd5c07
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The embedded content suggests a lure related to a book or resource, likely to trick users into clicking the malicious redirector.

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=marisa%20peer%20i%20am%20enough%20pdf%20download In PDF document text
    • http://files.andrewdosshistory.com/uploads/1/3/2/6/132682640/nesiviwetax.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/1/0428/1381/6995/files/wezajavupavobopopurotako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/63477079925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/dagoxulotop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/bedegasijeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/62657776324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/36996838228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/nagijinujuxugapilib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6187/0743/files/zurosuwosovokirilufukawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0370/files/63402410578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/meteorological_instruments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/43028811041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/70050710696.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 2

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_off00006286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5552 bytes
SHA-256: f5106b8f9633a02327a22b3d5675cb4cf680283179a931c11142fd96b0796cd2
font_01_sfnt_off00007550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 10284 bytes
SHA-256: 8ebc09341f6c4717c6c40477550d998c1689e044ba50c8878c748b02b4153afe

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