Malicious PDF — malware analysis report

Static analysis result for SHA-256 62391ebb0a06b3a8…

MALICIOUS

PDF

52.1 KB Created: 2020-08-20 01:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99fd3f843f4d0eebe2532c0b582109e8 SHA-1: 149fcd66857b90f5e7dc3211a20ccd61b9985247 SHA-256: 62391ebb0a06b3a8f9717ce5868b996df4be399fc4f79b4587c24a0168c725ef
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed for SEO manipulation, ultimately redirecting to malicious infrastructure. The primary lure uses 'Hikvision camera installation guide' to entice clicks on the malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt.

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=hikvision+camera+installation+guide In PDF document text
    • http://files.hkcofc.com/uploads/1/3/2/6/132683111/lobojevaresale_jojolurirukekof_nunaduwarutare_rulilik.pdfIn PDF document text
    • http://kadodevi.adelantechc.org/uploads/1/3/2/6/132682878/siwiruba-lebuduj-bunibuzowiwo-vofuxa.pdfIn PDF document text
    • http://luzek.watersportsinkorea.com/uploads/1/3/1/4/131409546/zufivotekut.pdfIn PDF document text
    • http://files.datamakers.com/uploads/1/3/0/9/130969231/sekuzun_debelel_tejiwege.pdfIn PDF document text
    • http://files.impactcdyouth.com/uploads/1/3/2/7/132740462/b8b5e9e49aea.pdfIn 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/1/0437/0379/5877/files/al_quran_sinhala_translation_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/sosunutulokutowilosokubev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/11th_science_biology_ncert_book_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/93939580502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/l_argumentation_juridique_stefan_goltzberg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6549/1106/files/puzoxudenaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6060/6616/files/decimal_to_minutes_conversion_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bukidesokat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/43132651987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/6811410582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/workplace_health_safety_and_welfare.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5224 bytes
SHA-256: 3fd3d195882ab59e8cee97476908a30defe4c0d51665dc08356c387ea7ffacb5
font_01_sfnt_off00007471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 13596 bytes
SHA-256: 194facc5cf9cfb64739a4277290c81ef1a7629210afc74cbb964ddb8cf09ddd6
font_02_sfnt_off00009f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F49 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
font_03_sfnt_off0000b4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e