Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f6d52e6a2a756d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 14:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85e67cf8b71808c5b37a81cd36e80224 SHA-1: d0316f9a36ca3702de17be4117804e15d52b11b1 SHA-256: 28f6d52e6a2a756df70827b80d085420d7eef8d15f5317fbe554dabed014c339
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body text, though heavily obfuscated, contains keywords related to sheet music, suggesting a lure to entice clicks. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

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=the+entertainer+sheet+music+beginner+free In PDF document text
    • http://files.jcudiveclub.com/uploads/1/3/2/8/132814241/7517770.pdfIn PDF document text
    • http://zomoras.carpetcleanersnetwork.com/uploads/1/3/1/0/131070588/6484a81.pdfIn PDF document text
    • http://zokema.americanenglishsounds.net/uploads/1/3/0/7/130775085/5674627.pdfIn PDF document text
    • http://files.marcushedahl.net/uploads/1/3/1/4/131482892/1606082.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/1/0448/2249/5389/files/bearing_capacity_of_soil_solved_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/carboxylic_acid_and_esters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/bl_novel_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/starwood_brand_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/cluster_random_sampling_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/siketarofiditudiwisulisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/13998653498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/44097572437.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 3

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_off000070f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 5352 bytes
SHA-256: 532abee3367f3f734e2545b36cc497861dd28cd3ae4deb51507931231f137930
font_01_sfnt_off000082f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F2 10760 bytes
SHA-256: 62216b605624fd94d5ca741db79ef4351886b7300199727a7ebcd2f23d9c1949

Open this report in the interactive analyzer, or submit your own file for analysis.