Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50113adb620a253…

MALICIOUS

PDF

44.1 KB Created: 2020-07-31 02:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccf8d397a7eb78ca63e76aa472ed2367 SHA-1: 93a699e30689ad2b75b83696538b92448632b0d6 SHA-256: a50113adb620a253191987128d0d752b0c76c11d7f81fdb5f93e786f2fe08240
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to downloading 'Corel draw x5 tutorial pdf free download', suggesting a lure for users seeking software. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=corel+draw+x5+tutorial+pdf+free+download In PDF document text
    • http://files.benabbydesignsco.com/uploads/1/3/1/0/131071037/dukibov-nilipuniku-lubexaduker-badafenekedomud.pdfIn PDF document text
    • http://files.zacharysasim.com/uploads/1/3/1/0/131070207/3011665.pdfIn PDF document text
    • http://files.peaceloveandhairsalon.com/uploads/1/3/1/8/131871909/3927389.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/1/0434/6681/7689/files/28985855937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/8769497521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/towimulanipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/97865655109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/zikabetukep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/ditiwivapesexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/5918725722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/37932430268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/sakeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/17414525248.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 4

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_off00006e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 5048 bytes
SHA-256: ecc4e6324f1678d40cfa6ed0f34934260d2b73a13fe701bc02031aa2a2421a52
font_01_sfnt_off00007ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF1 10220 bytes
SHA-256: d6bd5480cb612a97b1925c4c48a058cf922ee9dae39bf9f855278bf8a2375be4

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