Malicious PDF — malware analysis report

Static analysis result for SHA-256 357b55b471137e30…

MALICIOUS

PDF

60.5 KB Created: 2020-08-11 22:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 636419e58cad9a8dc2b6ff6fd9611212 SHA-1: 2c93603a6be63e59559fc513b0cb9df234603920 SHA-256: 357b55b471137e3074f2c605417e610f4d12cf82b087fb5b88857c4b3fb03457
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a 'Samsung balanced scorecard pdf'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is the most significant IOC, likely leading to a phishing or malware distribution site.

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=samsung+balanced+scorecard+pdf In PDF document text
    • http://files.barbaradavisgallery.com/uploads/1/3/2/6/132695280/jepokirebo.pdfIn PDF document text
    • http://files.sccliteracyproject.org/uploads/1/3/2/7/132740445/navotudelevu.pdfIn PDF document text
    • http://files.tiger-tribe-shamanic.com/uploads/1/3/1/4/131413040/327153.pdfIn PDF document text
    • http://titix.dhsmusicdepartment.com/uploads/1/3/2/6/132681231/3f5902e16d59f.pdfIn PDF document text
    • http://files.prestonfreshersweek.com/uploads/1/3/2/7/132712306/fb9b701b20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/45204463181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/gagenujokowutumelizuzefur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/17993059219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/fipalasova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/cahier_de_vacances_maternelle_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/18960743766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/billy_graham_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4687/6837/files/convertir_de_a_word_para_descargar_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/nazaxinosogixixaraxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/7618321802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/mowoxubuxizori.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000989f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x989F 5716 bytes
SHA-256: 4a86b9337b3fd65ab7f3cb000afbd1dbee01c791063580d1fe6893362b40bbbd
font_01_sfnt_off0000abe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABE5 6556 bytes
SHA-256: 9cc1f2082bc2436c005c727c9b0ae8fd693bb8b8baa3d1c3314bcbf7aa89cfb8
font_02_sfnt_off0000bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD42 11188 bytes
SHA-256: 44efafec61d4158dee917ceb5410bd92674fbc213d8394e3a4f3c9a375c30d99