Malicious PDF — malware analysis report

Static analysis result for SHA-256 243876961de1f6a1…

MALICIOUS

PDF

49.2 KB Created: 2020-08-11 17:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df7e6b0ad7dd20481c14d6b872713d64 SHA-1: a87e047e4bc59e6ef11db36309313bdc7abfb02f SHA-256: 243876961de1f6a195a1160c1a6012ccd01170397853bd7c5460b9b44397dd8b
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is a PDF about guitar chords, a common lure for phishing or malware delivery. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=guitar+chords+notes+for+beginners+pdf In PDF document text
    • http://files.carriecorebodystudio.com/uploads/1/3/1/8/131871597/kaporonamaguwogegixe.pdfIn PDF document text
    • http://files.sydneymcneillwrites.com/uploads/1/3/1/3/131378950/lekoweziret-jiwopisemitofu-jozubivopane.pdfIn PDF document text
    • http://files.deltamoonsoap.com/uploads/1/3/2/6/132681517/lemeju.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/1/0428/9753/9231/files/63274650685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/laxigitifudavizemitipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5081520916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/defoduxevivufuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/19060571911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/hand_embroidery_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/fexofadelegamutud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/mapudegamamikosamoxaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/72622784944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/fulasakusagema.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA4 5556 bytes
SHA-256: c57d2099a9ad4906861d0254ebef10e919d6a8f97e5cbdc4ffb5229f53d98bbc
font_01_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 9980 bytes
SHA-256: 4f7fb4d1f418ebf4f651d64a69de808d3c2cde821a228f077c5973dfd611b13c
font_02_sfnt_off0000a1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D2 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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