Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a4a6632cc0b965…

MALICIOUS

PDF

48.2 KB Created: 2020-07-29 11:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82bd0615645ebbc70ea67e5c960c040f SHA-1: 1b9ab98018c3b413e03fdb29e52435019f232f6e SHA-256: 37a4a6632cc0b9651d83502a01cbaf0aae9addfc87e196977467e22e51602048
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a magazine or catalog. The presence of a 'download button' heuristic further supports a social engineering attack. The primary malicious IOC is the ttraff.com redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=revista+hinode+ciclo+1+2020+pdf In PDF document text
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdfIn PDF document text
    • http://files.storge.org/uploads/1/3/1/3/131379015/6855401.pdfIn PDF document text
    • http://files.awakeningcenter.net/uploads/1/3/1/4/131437508/pidanove-mutatiju.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/1/0437/4167/5685/files/57759374306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/jeregamegijipiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9793/9349/files/38731783899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1164/4324/files/16114741296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/3472752666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/gezibuzakinusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/gogubutomuvedukifunokaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/sudinep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/potekejobikoxupivore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/nufaxopop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/40027123011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/88751313845.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B6 3240 bytes
SHA-256: 738c069115236d4eab8568dcb23b16ed4774e243ac33eab30c6d2e471c38c542
font_01_sfnt_off00007d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D44 5328 bytes
SHA-256: 754be96aa46145b9c9999721462a1241d8bfc758fb8925500becb8c7927cb6ae
font_02_sfnt_off00008f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F65 10508 bytes
SHA-256: 2dfa8e34a5499d4f508916a004e692c8e212130f3e53583d89dd8782c026ba87

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