Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fbdf72b4c9d32a…

MALICIOUS

PDF

54.9 KB Created: 2020-08-06 03:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96681a9ff007a40905bfebf12f2ab09e SHA-1: 0553624d9fe96d83fde56b08d439c08396cbe8f7 SHA-256: 20fbdf72b4c9d32ac4861e2008bc09293aa7e927e01f24b20ed294e8ce05cdcd
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a lure related to an Arduino manual, but the embedded link redirects to a known malicious domain. The heuristic firings indicate this is a malicious redirector and part of a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern. No scripts were extracted, limiting the analysis of further stages.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=arduino+mega+2560+manual+espa%25C3%25B1ol+pdf In PDF document text
    • http://files.funcde.com/uploads/1/3/1/0/131070982/5283331.pdfIn PDF document text
    • http://files.hannahbroderphoto.com/uploads/1/3/2/6/132695663/4334367.pdfIn PDF document text
    • http://files.oldcapitolumc.org/uploads/1/3/0/7/130776069/f3bd5e9a55a9c2.pdfIn PDF document text
    • http://tikezil.eagleyoungmarines.org/uploads/1/3/1/0/131069839/6216512.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/1/0438/2117/0850/files/vesoduwemamuran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/fefanepilumeruvakajaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/academic_ranking_of_world_universities_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/47771156084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/wavanex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/94165665422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/91037366787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/34367852593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/27272798023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/70601069142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/fegos.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 3

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_off00009454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9454 6116 bytes
SHA-256: f5fe474e61a2ee45eff0a52ceed6b2db54d745231a1c78aba1b05252d70a3d90
font_01_sfnt_off0000a8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C8 10640 bytes
SHA-256: e06fc2211d3eb903e33d5312d14f136d544e564ae58c17e13579e81ea127702a

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