Malicious PDF — malware analysis report

Static analysis result for SHA-256 c844e9d1a57cdd61…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 19:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 894d147179ca934e5007fcf4ea49b8ca SHA-1: 7cece7161546d19a228ebc69caa090f824fc46a1 SHA-256: c844e9d1a57cdd61fdaed75ee25c09e5b058b0e0fb903eac9a56d4de8b9fbe92
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one specifically identified as a malicious redirector. This suggests the primary goal is to direct users to potentially harmful websites. The presence of numerous links, many pointing to Shopify domains, indicates a link farm or SEO poisoning attempt to mask the malicious destination. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=diablo+2+rogue+merc+guide In PDF document text
    • http://files.ivoryleaguepublishing.com/uploads/1/3/2/6/132681969/didane-tatizezo.pdfIn PDF document text
    • http://selukaz.tsabs.bg/uploads/1/3/0/9/130969690/rujajexubowefa.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/1/0431/2930/7293/files/65808479827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/39862403115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/voruji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/boxilifaroxidiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4170/0505/files/jesewujodagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/dejukubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/temporary_internet_files_location_has_changed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/91847014227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/24981702409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9232/9116/files/boradekix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/57958174701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/75148920502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/6615/0303/files/zafejuveweripofo.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 2

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_off00006747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 5352 bytes
SHA-256: ac9ad2d4e121b7470a9932fd952778f2254f0b240d8f4147172cd3a15e88aa17
font_01_sfnt_off00007957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7957 10412 bytes
SHA-256: 08a5210d3e09e91586458d13109d92b1a5c99c822fefee3a87d88f58a30b4a5d

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