Malicious PDF — malware analysis report

Static analysis result for SHA-256 687cc63997f9e723…

MALICIOUS

PDF

45.0 KB Created: 2020-08-27 23:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 727365a39804b6cd7746fff0fbb8f781 SHA-1: 4d7c75912b3f4f73fe58475fb91cf8bf0cd931fb SHA-256: 687cc63997f9e7235f1826cd7ba2cd794cde074a3232fc53f77db0af96756c56
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.ru/pify?keyword=universal+remote+control+urc+r6+codes', is flagged as malicious and associated with SEO link farms. This suggests a phishing or scam campaign aiming to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=universal+remote+control+urc+r6+codes In PDF document text
    • http://dosirefut.slcollectibles.com/uploads/1/3/2/7/132712109/5532342.pdfIn PDF document text
    • http://files.nssla.org/uploads/1/3/1/3/131398008/lenirojigasap_gikorepur_gizawebakid_wedif.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/1/0430/4211/1637/files/nibof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/toyota_pickup_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/dejevaviwadefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/o_que__aprendizagem_significativa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/40740283447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/basic_english_grammar_tutorial_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/charmglow_patio_heater_parts_thermocouple.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/rigilap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/cities_in_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/dilesawavekupulexapipegel.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 1

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_off00006794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 5288 bytes
SHA-256: bd7adec9464961ef8ee74cad1f598a3a08973e0f15b90474980f0a395fe1e30a
font_01_sfnt_off0000797a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 14784 bytes
SHA-256: 67ab8666bb259645d94f0e7df2c4df501962f98b58475dbc0fbd9367fd817784

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