Malicious PDF — malware analysis report

Static analysis result for SHA-256 661c9849b859af5c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-17 11:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5342533c08235c209634b0621567f6bd SHA-1: 49f37394e7ecace5374a0f7e7fa93444730f12b6 SHA-256: 661c9849b859af5cb297952b974867e9de9d427a4195ff1c3eb6bee3d9dfbf07
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, suggesting a phishing or scam attempt disguised as an insurance policy. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious redirection pattern.

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=aditya+birla+capital+insurance+policy In PDF document text
    • http://files.davidfunkpainting.com/uploads/1/3/0/9/130969655/kizevevuwu_bopedebovufeso_moporobinibe_bukakaxobugage.pdfIn PDF document text
    • http://files.conresnet.org/uploads/1/3/1/4/131437657/bujetimonufigemipiz.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/1/0431/2236/0469/files/how_to_uninstall_microsoft_office_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/18971153631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/8448746350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/11887161504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/acrobat_professional_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/26252356119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/giduzixudala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/statistical_learning_springer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5180 bytes
SHA-256: 6bf2c9ae1b75d7b42bbdf45bdcc2a8690ebc06272a56e61f248748221d15d611
font_01_sfnt_off000074ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CE 10568 bytes
SHA-256: 1a11839f125c1db7ce24bcf2b3e5ec1e0435ae4c6da6fcded8178a0b500ecb1e
font_02_sfnt_off000098e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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