Malicious PDF — malware analysis report

Static analysis result for SHA-256 816af172cc31041b…

MALICIOUS

PDF

71.8 KB Created: 2020-08-25 11:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c13a208b649cef20abc829992daf4f83 SHA-1: 4a5dc574e3e6aa77b28c889b1df9e5cbe6f916b2 SHA-256: 816af172cc31041ba9f71fc53c1a18c75f9c5c0d82c312a9ac2dd12e0aec389f
234 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for technical information, likely to trick users into clicking the malicious link. The presence of a clipboard command lure heuristic suggests an attempt to trick users into executing commands, potentially to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=android+studio+bash+adb+command+not+found In PDF document text
    • http://files.brittbuirs.com/uploads/1/3/0/8/130814193/nubegas.pdfIn PDF document text
    • http://gazumu.klarahomes.co.uk/uploads/1/3/1/1/131164250/rikavuf.pdfIn PDF document text
    • http://sibox.familiesinfaith.net/uploads/1/3/1/6/131636725/diwezegewisibevur.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/1/0431/1888/7068/files/materi_batuan_beku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/azure_active_directory_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6851/3695/files/lubokadefugivarep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/ritozusakufuwixotara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/create_branch_in_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7339/5101/files/upsc_optional_subject_sociology_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/51265765591.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC6 5356 bytes
SHA-256: 8060b42d1c28ad5028d894dbbd88044c21720e7cd67398456af0e243a647eb43
font_01_sfnt_off0000cecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECB 14176 bytes
SHA-256: 6de3c22967000de01ffaf579a0e745469522cc39db65273d29dc1266db9ee694
font_02_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 16388 bytes
SHA-256: 0c82561ead172ac0e51412abe629b5944d5f81f469066018c017fef234fe4ba7

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