Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0b41135f4165ea…

MALICIOUS

PDF

48.9 KB Created: 2020-08-14 20:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0331881f26fd6ef5451b60368ed3731a SHA-1: 0af5487007a6691e4d13e8cadc23a168b80ddfe1 SHA-256: 0c0b41135f4165ea3d8d574461ebd311c0cf37f3e355cc29264ff0ad5e9b2890
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate software downloads, but a primary link redirects to a known malicious redirector. The document body and heuristics indicate a lure for cracked software, specifically 'Ashampoo WinOptimizer 17 crack'. The ML classifier strongly suggests maliciousness, and the embedded URLs point towards a phishing or malware distribution scheme.

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=ashampoo+winoptimizer+17+crack In PDF document text
    • http://files.elfencakesandbakes.co.uk/uploads/1/3/1/4/131406060/lidoxinugekox_maronevodemisut.pdfIn PDF document text
    • http://files.lehrco.com/uploads/1/3/2/6/132683357/kesinujaved-javirirevezok-tegone-turebapas.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/1/0436/1512/5662/files/differential_geometry_and_its_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/jurobapukudixuxoziziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/98562446788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6479/5046/files/18952819566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8791/1319/files/2142148574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/82246113303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/13299708585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/fototropismo_vegetal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4049/6033/files/ophthalmology_clinical_examination.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/kuby_immunology_6th_edition_free_download.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_off000064cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 5468 bytes
SHA-256: 507b573484ef03a90ca0fc2507a25c239c04f988b8716205f36401da5f9f8e1e
font_01_sfnt_off00007763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7763 14396 bytes
SHA-256: 91a2537104c9736946061a397b86419b4d4dfb020286a7246ebeb6d996b7fed7
font_02_sfnt_off0000a022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA022 16088 bytes
SHA-256: ba49a359edda73fb432b2118eee43e8681603f6c6f845ef214af08c3a95321db

Open this report in the interactive analyzer, or submit your own file for analysis.