Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b60afa549dfee6…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 10:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8da2bb7009088c7977dc35a31315bcc5 SHA-1: 62f5a4d436fd0129a50e869674253f2df6d5ecd8 SHA-256: c4b60afa549dfee6f4ce534aa20fa48f329e85837396a34d3f3cbe9eed221236
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed to distribute SEO-optimized PDFs. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary payload delivery mechanism. The document body, though heavily obfuscated, contains text related to 'cognitive behavioral therapy techniques and strategies pdf', suggesting a social engineering lure to disguise the malicious intent.

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=cognitive+behavioral+therapy+techniques+and+strategies+pdf In PDF document text
    • http://files.alexandrabroches.com/uploads/1/3/1/3/131379759/zatorafedonafep_xaluliwobafam_mixoja.pdfIn PDF document text
    • http://files.lclfarm.com/uploads/1/3/2/6/132683328/goxosi.pdfIn PDF document text
    • http://teroguliz.furmansleeplab.com/uploads/1/3/1/1/131163635/b731a.pdfIn PDF document text
    • http://files.holinessandpolitics.com/uploads/1/3/2/6/132695445/5029775.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/1/0431/5083/5876/files/50759998814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/xafaxibebes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/28393355614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/85750045252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/remerol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/47246154218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/32754157094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/2416727096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/asian_tigers_economic_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/english_pronunciation_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/aparajita_stotram_in_oriya.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 7

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_off00007180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 5748 bytes
SHA-256: 1f72c72ebbc8de4adf2f396ca95d8539d7729c87ad6768e40ade39cbcf7b4cdd
font_01_sfnt_off00008508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 10556 bytes
SHA-256: f5f64cc8f6f976a323d34307e87ca7f1fbee0a9219e02fd98ca9cfc8f8980629

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