Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a4152cdf989fed…

MALICIOUS

PDF

53.2 KB Created: 2020-08-15 05:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 12082d47966c58e282c66ea11c520f80 SHA-1: 5c273d714c4f382e3d3ff4bf7491ea309f9912c6 SHA-256: c1a4152cdf989fedd93b657ec645af9e5fba31dac7e47ed8c5e9166dff52f831
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wb?keyword=list%20of%20psychological%20tests%20and%20measurements%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external PDF links, including one hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=list%20of%20psychological%20tests%20and%20measurements%20pdf In PDF document text
    • http://files.orderhollywoods.com/uploads/1/3/1/4/131438211/16afd752ad274.pdfIn PDF document text
    • http://files.prohuman.co/uploads/1/3/0/8/130814081/xotowo_ripikekun_lupazoxototaf_deneboke.pdfIn PDF document text
    • http://files.sproutsmyanmar.com/uploads/1/3/0/7/130776485/pofixuzajezeto.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/1/0429/6772/8279/files/gazifunuraxozujukadanejiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0987/5873/files/52123261023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/lopabejajatenozid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4665/6408/files/back_to_school_activities_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/44624917609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3514/0007/files/ruvogetisidigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/bider.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/crioterapia_cervical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/30998794874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1217/3463/files/26720218418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5797/8273/files/nibafeje.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_off000091c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C4 5612 bytes
SHA-256: fa8cbe49f72a44eda0a7395ed9b397b3d2d65deaf47f4871dea93f89a72c3d13
font_01_sfnt_off0000a4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 10176 bytes
SHA-256: f0a4e0e829665f8efd77070cf41774fe2ae8ef486674b74c15a1ef10f12726a7

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