Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca56d38b943fa684…

MALICIOUS

PDF

38.6 KB Created: 2020-08-14 21:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec417ce334585490b645604fdb1b3f38 SHA-1: 0973892bc8892996debdf8c12cc608a93e6df92b SHA-256: ca56d38b943fa6847757e22c22b171033c08ea8f09b957ecca6973f7d0c7cf63
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, specifically pointing to 'https://ttraff.cc/wb?keyword=convert%20png%20to%20pdf%20without%20losing%20quality'. This indicates a social engineering attempt to trick the user into clicking the link, likely leading to a malicious site. The document body, though heavily obfuscated, contains text related to converting PNG to PDF, reinforcing the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing 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.cc/wb?keyword=convert%20png%20to%20pdf%20without%20losing%20quality In PDF document text
    • http://files.businesswritingmasters.com/uploads/1/3/1/8/131856992/5201057.pdfIn PDF document text
    • http://files.nightheronfarm.com/uploads/1/3/0/8/130814861/gofamoviraze.pdfIn PDF document text
    • http://jipeg.phase3security.com/uploads/1/3/1/3/131384284/nufazurenorupozi.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/1/0436/5864/1573/files/olympic_weightlifting_training_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8166/2613/files/23351391577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/sezipovomekaxesizuvofaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/cub_cadet_src_621_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7838/3771/files/pdf_annotator_full_programlar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sedafasejizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/zuzududunosukovunuvebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/bufodusagerivakedijibaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/50862512928.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_off00005887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 5588 bytes
SHA-256: 5480b1c7e72cab3e1f15680c22bc0bfed2dbddec959c556fae5c26ac404397c2
font_01_sfnt_off00006b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B98 9988 bytes
SHA-256: 86ed56555e7deb48c45deed04adfdc7d8ac2cc568d1d50fc0aa9c7d59165192b

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