Malicious PDF — malware analysis report

Static analysis result for SHA-256 c266dd8c32163868…

MALICIOUS

PDF

38.7 KB Created: 2020-08-20 00:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 314d9703783b4e57eb928422c791b771 SHA-1: 9eba03c10884e97cf7df50ccb84ef4df9766dfb0 SHA-256: c266dd8c32163868cfc07ecc60399fbca7a5320c529d6b87b7258c6a764972eb
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and references a 'cessna 182 service manual pdf', indicating a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, some of which are benign but others are unknown or malicious. The ML classifier strongly flagged this PDF as malicious.

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=cessna+182+service+manual+pdf In PDF document text
    • http://meluv.humphreyadventures.com/uploads/1/3/0/7/130776330/6021499.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/1/0430/9476/9821/files/31150791399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0622/0712/files/introduction_to_java_programming_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/descriptive_paragraph_topics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/anyong_lupa_at_anyong_tubig_sa_asya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3463/9522/files/zufixisomepinoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4587/8941/files/37169864992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4732/1751/files/gesudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/scholarship_essay_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/antihistaminicos_embarazo.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_off0000516e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x516E 5644 bytes
SHA-256: f417c02929e5d93272275b1162a5c4a27ce2e1032f2345d154f173b7e4479184
font_01_sfnt_off0000648c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648C 13012 bytes
SHA-256: c0796bc4c7865d3864770fe6b17c3204ae593c7ad82ef359eb7697e8430fcc33

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