Malicious PDF — malware analysis report

Static analysis result for SHA-256 281960c1d85a05f1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 15:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84b291bb1cee7ff94153989e6ece99d5 SHA-1: a3ff98537e3fd962f9a02d8af2ea01d801a71a3e SHA-256: 281960c1d85a05f1d1ddc1cff1bd720396260e626475406b7f3b7a0661053369
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to file conversion and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting an attempt to manipulate search results or distribute content widely. The primary malicious IOC is the redirector URL.

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/pify?keyword=converter+mp4+to+mpeg+apk In PDF document text
    • http://files.joyenomoto.com/uploads/1/3/1/4/131454501/e4782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/bafupavuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0426/9468/files/zapudegudepumineludojin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/free_astrology_books_in_kannada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/gabimezijikifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/87113879237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/cetonas_propiedades_quimicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/tetebigewekeluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0891/5616/files/79359636854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0189/5322/files/jalob.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 1

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_off00005f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 4904 bytes
SHA-256: ed29f0f24987de5df2882320c18051a78e0d5d38c7512a7417775d4b7c0f463e
font_01_sfnt_off00006fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD0 10896 bytes
SHA-256: 3ae0b806227baab6c51074f3c45c6b0c368f12a939c8c85b191d9a1309146e5b
font_02_sfnt_off000094dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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