Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb55ba4ccc773bd…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 19:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 816d93bf3e990d353f33b92064cd6949 SHA-1: e1b54d13a89dbaa12c82230b1ef3ef5eb4f4b805 SHA-256: 1cb55ba4ccc773bd298df5bc014df374da681742170fe0037a896b6a37fb9d85
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary malicious link, https://ttraff.ru/pify?keyword=contoh+hazop+report, is identified as a malicious redirector. The document body contains garbled text but also includes the malicious URL, suggesting an attempt to disguise or embed the malicious link within otherwise unreadable content.

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=contoh+hazop+report In PDF document text
    • http://tetebezu.sscoinworks.com/uploads/1/3/1/6/131636725/2663249.pdfIn PDF document text
    • http://files.oscarconstruction1.com/uploads/1/3/2/6/132681464/1994782.pdfIn PDF document text
    • http://files.briandainesartist.co.uk/uploads/1/3/1/4/131406558/36fa250202ebae9.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/1/0428/9318/1095/files/reaccion_alergica_por_picadura_de_abeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/jedijeguxuvubigis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/chemistry_vsepr_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/1857835211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/wobomutusubuzigegukatazof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/3562351852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3511/2103/files/cash_audit_procedures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3309/9430/files/fujijazifuwemokoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/cdse_notification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/60239899842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/3973/0336/files/balada_para_adelina_guitarra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/tibidid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/sovemonupilumepes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/collins_scrabble_dictionary.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E49 4652 bytes
SHA-256: 3693135dba96ed2c6f94bd950baa1aea628edf3469c26e8eeea79f199d0b5137
font_01_sfnt_off00007e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 10400 bytes
SHA-256: ca228d6a22d3b0e3d56f50fcfb630ae667db02bda1a800a66904bc82a871cf93