Malicious PDF — malware analysis report

Static analysis result for SHA-256 21bb782e9a6b30f2…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 23:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0d388279cedf55d793066b2ef8ecf29 SHA-1: bf8d12ff81bd938a77b8a349df407f2e201cc98d SHA-256: 21bb782e9a6b30f2a31e26f787aaefb97ffc7271a14b957d6de9cb1aafa250ac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised with the text 'data analysis skills pdf'. This link, https://ttraff.ru/pify?keyword=data+analysis+skills+pdf, points to known malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=data+analysis+skills+pdf In PDF document text
    • http://files.sweetdreamsgroomandboard.com/uploads/1/3/0/7/130776073/7810500.pdfIn PDF document text
    • http://wikiguvoj.maeganfairchild.com/uploads/1/3/0/7/130776757/227334.pdfIn PDF document text
    • http://files.hightopconsulting.com/uploads/1/3/1/3/131383934/diwozofeze_kituxor.pdfIn PDF document text
    • http://files.aoh-patrickryandivision.org/uploads/1/3/1/4/131438067/befawavarojajin.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/1/0431/4470/8245/files/39631722434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/62213927120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/aceites_esenciales_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/26966991717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/git_ssh_config.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8017/0137/files/fixijaraxikedeguwegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/unity_look_at_mouse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/13396241753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/memagimifesivelir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0327/9517/files/xagexuwomeseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/94507450830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/anger_iceberg_printable.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 5

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_off0000645e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 5104 bytes
SHA-256: b284e3b46c6b161f45ab0092eb4d62e0dd8edebc2bc75fc552272c7699abf2a7
font_01_sfnt_off000075e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 9980 bytes
SHA-256: bbc92e7a4b8fdd4c9de45b7ba4c73d24d4ad518f918cb6ad201e5c8b557a9ea0

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