Malicious PDF — malware analysis report

Static analysis result for SHA-256 28df1aa35f729918…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 09:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82a817f3b672f7f834c6e324e25cea9f SHA-1: 9e977a477b07ec7c62d24ccda00f05b9f2bc8ce1 SHA-256: 28df1aa35f729918f3574af78707d3d61389e3b03356ccea7ff2ec49d03bfae3
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying it as a PDF SEO link farm. One of these links, 'https://ttraff.com/pify?keyword=rectification+column+pdf', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains the malicious redirector URL, suggesting the document's purpose is to lure users to malicious infrastructure through a deceptive link farm.

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=rectification+column+pdf In PDF document text
    • http://mutid.thearttherapystudioithaca.com/uploads/1/3/1/3/131384635/0db453c2.pdfIn PDF document text
    • http://files.illuminateconferences.org/uploads/1/3/1/3/131398477/zuzefema.pdfIn PDF document text
    • http://files.paintingsbychrislwilliams.com/uploads/1/3/1/4/131407812/d716b.pdfIn PDF document text
    • http://files.clubcollege-bound.com/uploads/1/3/2/7/132710678/7a98010460.pdfIn PDF document text
    • http://files.hlathletics.com/uploads/1/3/1/4/131437563/vozuvirikezesabe.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/1/0437/1821/3797/files/appointment_with_death_play.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4291/9832/files/90749199094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4983/4901/files/7068330593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/jalinogug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/76175611811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/bisuginesifapizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3947/3314/files/77473689620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/68824650783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/13068506459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/pitobatinob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/vutuxoludukoxiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6976/6821/files/8368068708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/65366150901.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_off000069a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A0 5032 bytes
SHA-256: 656952592cfcc85a5d2c0e001f72174a10a30efa265cc9625730e5c48dd3269c
font_01_sfnt_off00007abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABC 10176 bytes
SHA-256: 177e3eddfa86d869db8179ea1782aad9baeb02862050a2e7e7016bcacbc2671e

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