Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f234264e29f0626…

MALICIOUS

PDF

125.7 KB Created: 2020-08-11 03:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 568c67e23a54b39ad38e81bc8b8f88fd SHA-1: b5788dcad36de151174a28fd0b2ef9bd54182563 SHA-256: 5f234264e29f0626196c312f6de8c4d3772272bfa1f1f5c673b7764ed525fcef
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body and heuristics indicate a link farm strategy, likely intended to trick users into downloading further malicious content or visiting phishing sites under the guise of free resources. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ejemplo+de+auditoria+financiera+de+una+empresa+pdf In PDF document text
    • http://vozadeliv.radanjana.com/uploads/1/3/0/8/130874359/f0950.pdfIn PDF document text
    • http://files.ipsproptech.com/uploads/1/3/1/1/131164424/ditalalamudo.pdfIn PDF document text
    • http://files.learnenglishspelling.com/uploads/1/3/0/7/130739376/0e1b31.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/higher_category_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/vexoremazesurugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/42074304156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/aahe_manohar_tari_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/21040258986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/banting_diet_plan_for_weight_loss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/chernobyl_disaster_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/outlook_preview_handler_error.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/57661303480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/94844966085.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D49 2624 bytes
SHA-256: f6176642badf23d3b859140f980e33ed2197779d6d42f78889c7ab8713aa4f6e
font_01_sfnt_off000187b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187B0 5216 bytes
SHA-256: aaeb1ed18880c493bceea200f42c117d46746c1151eb42dfecb590047a958367
font_02_sfnt_off0001995a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1995A 12988 bytes
SHA-256: b7425685b7e8e21ffb7e62aa0595a6f32a4a35453f610a9382355d7474dd3bbe
font_03_sfnt_off0001c36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C36C 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_04_sfnt_off0001d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D899 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3