Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa500113fd704b6…

MALICIOUS

PDF

39.0 KB Created: 2020-08-13 05:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f9e456ecbd9c67a0ad9901e7730ade1 SHA-1: 2146ad2cbc0dbef0e906e8b1ef53a9c66f83a58a SHA-256: ffa500113fd704b6ebb57f5ad897994b910f5c2b3bc9d267199dbb1595065ed3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the redirection to a known malicious site, and the PDF_SEO_LINK_FARM heuristic indicates a large number of similar links within the document.

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=data%20structures%20and%20algorithms%20in%20python%20goodrich%20pdf%20download In PDF document text
    • http://files.rbrphotography.ca/uploads/1/3/1/4/131406344/tuwanivoxis-zoxef.pdfIn PDF document text
    • http://files.lepinkandco.com/uploads/1/3/1/3/131380966/7173eb110856d.pdfIn PDF document text
    • http://files.normsphotoblog.com/uploads/1/3/1/4/131437005/lowutamaveja.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/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0333/7114/files/carpentry_workshop_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/18982407435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/99457821650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/powezovitefoken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/zunufubokawogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/94902333313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/83162401742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/deadmau5_minecraft_skin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/zuvegotogabidatep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/bakupagumo.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 7

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_off00005428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5428 5760 bytes
SHA-256: 2b097f71791394eb95511184eb0818445f2215153bc64fe8cb2291c115cffd8a
font_01_sfnt_off000067af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 11380 bytes
SHA-256: bda831207c5d5fd73c7ff99d7576ea7f19af5d38d55e70fdff0a34c873e9d807

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