Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe99d691653e6bb…

MALICIOUS

PDF

53.5 KB Created: 2020-08-12 01:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d30af0962d7b58af3d044d2dd58d68b9 SHA-1: 63b9e7384c381035940e8af3b8041693255149fc SHA-256: ffe99d691653e6bbd7e7520214f4ff75815a618610486cd12671cd0faa03deec
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Autolisp dwg to pdf' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=autolisp%20dwg%20to%20pdf In PDF document text
    • http://vagoju.alliesonthejourney.com/uploads/1/3/1/4/131407406/2ed34f397b.pdfIn PDF document text
    • http://tadijaka.chesapeakeorchestra.org/uploads/1/3/1/4/131452938/4114670.pdfIn PDF document text
    • http://files.fbcleadhill.com/uploads/1/3/1/8/131858592/1bb67f.pdfIn PDF document text
    • http://files.referendumcentral.org/uploads/1/3/0/8/130874435/fesetitojana.pdfIn PDF document text
    • http://pofise.leahmcintyrejewelry.com/uploads/1/3/1/4/131453133/pimebir.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/1/0435/9382/6463/files/45197812944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/82389550041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2718/4281/files/21501789496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/papotapibubogutovisus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/tapakiliperofadukidol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/vaxibedevom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2462/9405/files/pajitikokikakulitov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/65613650782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/moxefas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/66674866367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/jebikabojirofekuzetigof.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 6

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_off000076d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4 3936 bytes
SHA-256: 224d99915c4c43a8c09247f3f96307870b4cb33cf5d110ebf7f3a51c65532b7e
font_01_sfnt_off000084ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 4984 bytes
SHA-256: 6569e9578d71e0812af4759c4aefbb29aa37b18d12fd5112cfc2f9952b5233a4
font_02_sfnt_off0000961f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961F 22496 bytes
SHA-256: 491a26bb84755d1e4da29cd1620a1789cadc6e33b155ee26e7669be20160477d

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