Malicious PDF — malware analysis report

Static analysis result for SHA-256 188900f07ae07707…

MALICIOUS

PDF

37.0 KB Created: 2020-08-08 09:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6e5719479c96285aaf0f0331b77187e SHA-1: edfae93e684a8441710c8331d04081e2153b792e SHA-256: 188900f07ae077074ef1d9f408805efddbab796bfe5a2052b6d34f9b2d892ba5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to manipulate search engine results and direct users to harmful sites. The ML classifier strongly supports the malicious verdict. The embedded URLs, particularly the one pointing to 'ttraff.ru', are the primary indicators of malicious activity.

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.ru/pify?keyword=yearning+for+lightness+pdf In PDF document text
    • http://xolap.jasontoonwrites.com/uploads/1/3/2/6/132681501/4167794.pdfIn PDF document text
    • http://files.talkeasy.org.uk/uploads/1/3/1/3/131380128/04033f7d.pdfIn PDF document text
    • http://files.heritageecc.com.au/uploads/1/3/1/3/131384468/a2ac09ae953e3.pdfIn PDF document text
    • http://files.jc-engineering-solutions.com/uploads/1/3/0/7/130739076/8345195.pdfIn PDF document text
    • http://files.jonnywilderness.com/uploads/1/3/1/4/131452804/gemeni_kexodipav_dejuwugazexi.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/1/0437/9040/1685/files/silonudazugesiduzimow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/zoxezofadejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/goxovaxilivizogezage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/wenapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5843/3943/files/cet_key_answers_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/84525649803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/asme_y14_5m_2020_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/15766832766.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 8

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_off0000540d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540D 5264 bytes
SHA-256: 9cea6426afae10fea4d097af67ce97e92a148d0792f7772cb4543a29418a2b0c
font_01_sfnt_off000065ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65ED 9852 bytes
SHA-256: c21718ef4874204d7a7bcd5b1b76a2a12742093a670913c3b25d3c6a27813c80

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