Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8458f5835b7af4…

MALICIOUS

PDF

53.1 KB Created: 2020-09-06 15:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6f8ad241d9c3e5ef8dd664d6d65c86b4 SHA-1: 7a0eb80c1dba1325e0ca7f4e0564f6d46adf94ee SHA-256: 0f8458f5835b7af4a4b95bbd89a853c222a1f62a3d21c8837d4d2f2ccd6371e3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating malicious redirection and a link farm, suggesting it's used for phishing or malware distribution. The primary malicious URL identified is a redirector, which likely leads to a malicious payload or phishing page. The document body, though heavily obfuscated, contains the malicious URL and references to PDF documents, reinforcing the lure.

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.link/wix?keyword=asme+b16.+34+pdf In 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/1/0431/5637/3659/files/1231456154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/wondershare_mobile_transfer_full_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9007/4018/files/spatial_analysis_in_gis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/48353598782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/types_of_business_tourism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7711/3758/files/cupcake_jemma_macaron_template.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2d96980ea4e847a6a7880b82de79ca64.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3eb302010e414e41a3cf82b8467ae960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7023/4524/files/69467032315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/topamuj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000072da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DA 5468 bytes
SHA-256: 5323246f72c1a3f49731c15c9137e24573aa12f4f8cfac62e1ace18ad9fdd913
font_01_sfnt_off00008578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8578 14072 bytes
SHA-256: 9435a6cdd9f27f7855da844b79ee5d53768705695c9585bb592292595b4e035d
font_02_sfnt_off0000b2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E3 16132 bytes
SHA-256: 06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e

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