Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a77bd03916ae487…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 07:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b490179e1e3c50f95be59483692b0151 SHA-1: a41ab4e969f760ff1a3f0ff87e8b592e82b64e75 SHA-256: 7a77bd03916ae4879fe67fbd7b605d8e41facf6317ad7fc281b27470b2ac0da8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to lure users with promises of free downloads. This suggests a phishing or scam campaign.

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.ru/pify?keyword=angielski+s%25C5%2582ownik+obrazkowy+dla+dzieci+pdf In PDF document text
    • http://files.punxsutawneylibrary.org/uploads/1/3/1/4/131410736/bimupenutifawodon.pdfIn PDF document text
    • http://files.opwtcstockton.com/uploads/1/3/1/0/131070762/begajawujipili-nazigam-wefukemo.pdfIn PDF document text
    • http://sadowab.riveraservices.org/uploads/1/3/1/4/131453284/8041327.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/1/0430/4646/9793/files/divinity_original_sin_2_black_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/minolta_srt_201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/a320_cockpit_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/44323436966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/spiegel_fourier_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/sunilejanawojimiwuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2142/9924/files/neuroblastoma_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/tubobepexapanafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/9827963228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/medical_report_form_kenya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/javascript_convert_html_to.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_off000065a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5816 bytes
SHA-256: 7ec2a7d97d23cd39608a508b8489f7f156a84a4ec1eb89ba6ba0a7f9d601d207
font_01_sfnt_off000079b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 11920 bytes
SHA-256: e167c8ff6024531d8e53dc385989a8a93156710b47ce64eaa91d50c5116f327f

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