Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c495a9c8c3082fc…

MALICIOUS

PDF

44.6 KB Created: 2020-08-11 21:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d61c0fdd0a63cfb551ec3b52ec08009 SHA-1: b477da0fb07c2cbaa869613c37d7f4bc0f9ddfdc SHA-256: 5c495a9c8c3082fcaa21c6f260b94c1360ebf650d13fb2580cff4759c456b8bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to redirector infrastructure designed to obscure the final malicious destination. The document body, though malformed, includes a URL that is flagged as a malicious redirector. This suggests the PDF is part of a phishing campaign, likely using a lure related to academic content to trick users into clicking malicious links.

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=child%20development%20and%20psychology%20questions%20and%20answers%20pdf In PDF document text
    • http://files.deathcog.com/uploads/1/3/0/7/130775245/11c07.pdfIn PDF document text
    • http://files.lilgothlivepicture.com/uploads/1/3/0/7/130738912/9506902.pdfIn PDF document text
    • http://files.scrollsawaustralia.com/uploads/1/3/1/4/131453022/fanati.pdfIn PDF document text
    • http://files.moraystore.com/uploads/1/3/0/7/130739616/5950678.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/1/0432/8102/3132/files/rigin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5196/6873/files/beloved_sparknotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4185/3333/files/3_phase_bldc_motor_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/97843517607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/behavioral_economics_for_dummies_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/58388208765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/dezoxetazipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/tubosajujusamubawuxeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/53628422390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/bowowilurosemurari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/bavufatobusubuxuwusozura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4618/2822/files/44566715063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/ubuntu_webcam_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/xurasizafiw.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_off00006db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB8 5856 bytes
SHA-256: 1a789e5d4cc87b8f899d08fd594bc9f99cd4d6669a0e66f23f7ef43e2ecfcb20
font_01_sfnt_off00008191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 10332 bytes
SHA-256: 281a353936cc7036ea636aac6d276624f9f879b823bbbaeb80bf2157238a2bb1

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