Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ef73df36366a64…

MALICIOUS

PDF

53.8 KB Created: 2020-08-20 08:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e45614eca053ca30087b9647e64a74d SHA-1: ddd4afd9bce6b006a2083075446b6848e5b19ed2 SHA-256: 53ef73df36366a644c77683c5b72d34342d9eee7fa1aec53115eba935d2b33cb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a medical treatment. The document body, though heavily corrupted, contains the same URL and a reference to 'wkhtmltopdf', suggesting it was generated programmatically. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for the malicious URL.

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=papilles+caliciformes+gonfl%25C3%25A9es+traitement In PDF document text
    • http://woluru.robertawolfson.com/uploads/1/3/1/3/131380213/dezutomo.pdfIn PDF document text
    • http://files.szuyunwang.com/uploads/1/3/1/3/131380558/8f8f97.pdfIn PDF document text
    • http://files.chrisheidt.net/uploads/1/3/1/4/131437322/roretomisibe-defejen-raxamugewif-rexubatuven.pdfIn PDF document text
    • http://files.c-lution.com/uploads/1/3/2/7/132740978/soruvikitu.pdfIn PDF document text
    • http://fuxupidal.highimpactanalysis.com/uploads/1/3/2/6/132683014/3bbf985c3.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/1/0437/6264/7192/files/8058901959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/28465614312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/votizepamesikegumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/32958107292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/vavamevujojojebukotelojer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/business_plan_sample_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/viwefebitenerapapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/14398064472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/subosobipipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/30436582199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/35562969667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/20997785736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/25374737855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5268/6742/files/sejabisotorevewipika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/letasofajonosowu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B2 5480 bytes
SHA-256: 42690497aa906befb647d7bf532f03a4ac9c375e12df93b78d0964c20975f339
font_01_sfnt_off0000a2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F6 11668 bytes
SHA-256: ef4ed476067a5a0abed91a0477fb8b256a805bc4d5093a60ee05284c1bb93339