Malicious PDF — malware analysis report

Static analysis result for SHA-256 d668a159de25d812…

MALICIOUS

PDF

38.6 KB Created: 2020-08-10 15:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 516a0b53c94089ef4ba3ded2e21d4398 SHA-1: a283383aa95800169f6ec64f172eadec15545ad2 SHA-256: d668a159de25d812826f21f004a674b32393ef7e332799b9f7c83d1cb436ab5a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though partially corrupted, contains text related to translation books and includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious URL is likely used to redirect users to a further stage of the attack.

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=bengali+to+english+sentence+translation+book+pdf In PDF document text
    • http://files.foe2051.com/uploads/1/3/1/3/131398145/8732605.pdfIn PDF document text
    • http://files.honeyscider.co.uk/uploads/1/3/0/7/130776632/2277781.pdfIn PDF document text
    • http://files.erinboake.com/uploads/1/3/1/4/131408170/venolunazoxim_jukawudev_newuwofit_xibepodojewib.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/1/0431/1692/0996/files/6250165780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/genetica_de_poblaciones_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/lotowarofimim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/56443081136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/html_web_page_to_converter_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/18765545564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/vapilujubilebisidozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/nationalistic_period.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1061/1607/files/george_foreman_grill_instruction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/functional_skills_english_level_1_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/payback_period_problems_and_solutions.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn 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_off00004836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4836 5672 bytes
SHA-256: ac42586caed5a54993ae081a5bc5b1bbe831d444976e7b3f1db6ce1b91d3ca3b
font_01_sfnt_off00005b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6E 5288 bytes
SHA-256: debe6b5751ecee02a632a4d365dc6f3d9954f772362e9a17fb239842d3ac18fc
font_02_sfnt_off00006cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 9440 bytes
SHA-256: bfb7dfc8044334d19017789b1e36362b55fe4311dfc1f072dd953587ae4563a6

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