Malicious PDF — malware analysis report

Static analysis result for SHA-256 78eb4dc334256391…

MALICIOUS

PDF

45.2 KB Created: 2020-08-21 04:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 065b42448d63adf4932e1c074b53986a SHA-1: 40354842a397f23e92c326abbf4a968f090889aa SHA-256: 78eb4dc3342563917a2bc2f56b6bf28eaf0b31c826f0169991864e5c81281273
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a social engineering tactic, presenting itself as a lure for a Windows 10 enterprise ISO download. It contains a large number of embedded links, many of which point to Shopify-hosted PDFs, but the primary redirector URL is identified as malicious. The document body and heuristics indicate a ClickFix social engineering attack, likely intended to trick the user into executing a command or downloading a second-stage payload from the identified malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PHP webshell / backdoor source high WEBSHELL_PHP
    The file contains PHP server-side code with the signature of a webshell/backdoor (request input fed to a command/code-exec sink). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.ru/pify?keyword=windows+10+enterprise+iso+msdn In PDF document text
    • http://files.dunedinhempcompany.com/uploads/1/3/0/8/130814411/555859.pdfIn PDF document text
    • http://files.acfields.com/uploads/1/3/2/6/132681916/wekovaxonab-folara-mebokek-vokaxibimag.pdfIn PDF document text
    • http://files.keppelcoastcameraclub.com/uploads/1/3/2/7/132712358/9966697.pdfIn PDF document text
    • http://lesux.fairmounthillcf.org/uploads/1/3/1/4/131453284/ruvejosirekoselajor.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/1/0440/4166/6710/files/safusivipokesamuwadopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/21213582092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/student_learning_objectives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/socialismo_y_capitalismo_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/vumiwixudavadiwiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5361/2199/files/fegelovazogebivejoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/http_ap._netis._cc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/treatment_guidelines_for_social_anxiety_disorder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5062/3385/files/30650583494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/keritegepebibif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/3923/6767/files/bag_making_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/pronoun_antecedent_agreement_worksheet_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/74538569494.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_off00006ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 5164 bytes
SHA-256: 2e0a0275f4f6c48a0b67b4fd70b357b83f4160832a0a80276f3bcdf4f415855c
font_01_sfnt_off00007d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3A 13440 bytes
SHA-256: e48c24ae435b58ceeac897799e576347c127a776ddacc16613194b66b44b7d37

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