Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fdf85ed4f1877a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 13:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 444b5671443f9a7d2350b288c637e619 SHA-1: b2374ac8de3fd629bce4763d0f69a9595f02e4a7 SHA-256: 50fdf85ed4f1877a0e247341d0bdad213829d330f6ef47ddc98397c3f221d244
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/pify?keyword=sky+blue+background+hd+wallpaper, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary lure. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=sky+blue+background+hd+wallpaper In PDF document text
    • http://rulega.wrangellboatshop.com/uploads/1/3/1/4/131437850/3189870.pdfIn PDF document text
    • http://files.saban-kazim.com/uploads/1/3/1/8/131871644/01cf269ea.pdfIn PDF document text
    • http://files.arsherbarium.com/uploads/1/3/1/6/131637108/e4adceb6ab3.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/1/0432/8567/6188/files/filtration_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/xosijagutofugasizewubodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/39230919659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/vamuxis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/19366622886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6169/6925/files/one_dimensional_array_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/jadobabuseku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/fafuper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/calendar_october_2019_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/mamasusiponalofijejabax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/69918863164.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 4

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_off0000616c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 5660 bytes
SHA-256: cb0b025e43625fb2f7a362019448d2c909f8075bd746ed2f28cf29c544ff35bc
font_01_sfnt_off000074ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BA 9728 bytes
SHA-256: cf53d1fecb7504e6e20c624f15a576b3b033d61a5e5f9f07da72a91b135cbb13

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