Malicious PDF — malware analysis report

Static analysis result for SHA-256 618c6f5a260cab85…

MALICIOUS

PDF

32.6 KB Created: 2020-08-05 00:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ba68ae135a358b6dc8f166857d8dc87 SHA-1: b82c81ab4da14464d7900df86ab61b6c28a87b7c SHA-256: 618c6f5a260cab859750b70537ae37a7d75b85b1bc8bbaf4598700f8636c5cfa
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially corrupted, mentions 'split pdf apkpure', suggesting a lure to disguise malicious activity. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination.

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=split+pdf+apkpure In PDF document text
    • http://files.glamorousreputation.com/uploads/1/3/1/6/131606605/pulomume.pdfIn PDF document text
    • http://files.romeprivatetransfers.com/uploads/1/3/0/7/130776131/62b8c565b5c1f.pdfIn PDF document text
    • http://files.cynthiadiggs.com/uploads/1/3/1/4/131409090/fb0091d.pdfIn PDF document text
    • http://files.pauladuartetango.com/uploads/1/3/1/6/131607027/8499225.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/1/0433/9820/1502/files/32002168637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/30666903021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/zuzixutojemadonatoluwor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8168/6423/files/4273443398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/47596646604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/wosogowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/affronter_ses_peurs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/tupulekisojituluxabew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/pazagokak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/12080203647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/fularowasinifosatokowunan.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 8

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_off000043df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43DF 5024 bytes
SHA-256: 4ea0874b1329183ab8069d554bf64f64b10712ed7e578025116bbbe82e13f63b
font_01_sfnt_off00005507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5507 9724 bytes
SHA-256: 9510df83adaa58e026fe7e924c2e7b5c0f248f6f25de2165367f314bd42544ae

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