Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6c1e0194ba4a27…

MALICIOUS

PDF

48.9 KB Created: 2020-08-08 08:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c64b7a4a7a1b65514be13b490824374 SHA-1: dbc9a5ad269831d3fc87ea6ce088f7b2389da475 SHA-256: 7d6c1e0194ba4a27d0c71fe46c04cbbcff4a0676c1fd8ef2f71c45000239b3bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Abrsm piano grade 1 pieces pdf' and the malicious redirector URL, suggesting a lure for free content. The presence of many links to external PDFs, including benign ones on Shopify, indicates a link farm strategy to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=abrsm+piano+grade+1+pieces+pdf In PDF document text
    • http://files.daniel12.com/uploads/1/3/2/6/132682585/21c62e.pdfIn PDF document text
    • http://files.metrovinyl.co.uk/uploads/1/3/0/7/130738919/8b79e9.pdfIn PDF document text
    • http://files.thegriffithgalleryonline.com/uploads/1/3/1/4/131453395/2952941.pdfIn PDF document text
    • http://files.shopnorae.com/uploads/1/3/1/4/131483281/9710002.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/1/0428/9835/8432/files/99231100330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/locus_score_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/55653843170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/nurumujas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/89217504437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/jatasikenatexogagajogasev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/abdomen_agudo_inflamatorio_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/xogepekuvudabotogel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/razikeruranofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/nobodunelesukuneribani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/83589772418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/the_wiley_handbook_of_contextual_behavioral_science.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_off000080ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BA 5624 bytes
SHA-256: 4f47c429f24bcaab97449ced35a7ff772bf2940fbf91852ee907b90eb2a9dc3f
font_01_sfnt_off000093c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C5 10288 bytes
SHA-256: 66a3142c0c65f8b456c56613f3c88f8e906837ac2b46356a8a0b898e3199df1a

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