Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dcefd2d5682e24…

MALICIOUS

PDF

37.8 KB Created: 2020-09-11 05:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b1dc49e383b6e80a0fd3ceb54ae1d2f SHA-1: 6a1e3d463fd7ba27253a267c7bbbc056ac04d7c9 SHA-256: b5dcefd2d5682e243de544b04e2702afa2fab03dae609c4193724941db35859c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This suggests a phishing attempt where users are tricked into clicking the link, leading them to a malicious site. The presence of multiple PDF links points to a link farm strategy to obscure the final 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.club/wix?keyword=buku+tentang+agama+islam+pdf In PDF document text
    • http://files.ccydnehobbies.com/uploads/1/3/1/3/131382092/muxukonil.pdfIn PDF document text
    • http://files.free2code-initiative.eu/uploads/1/3/0/7/130776562/3902795.pdfIn PDF document text
    • http://files.libbymourant.com/uploads/1/3/2/6/132683154/sadubibeleref.pdfIn PDF document text
    • http://files.nextav.online/uploads/1/3/1/4/131406149/5287878.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/1/0438/9748/7512/files/40946474923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/sources_of_carotenoids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/kagepasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/tenofobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2453/1101/files/frankenstein_penguin_readers_level_3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5926b4_3515c1e8a110423b947399820946d88d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3c460_03711582a37845a2a0a63a06ee8eb62b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/dragon_of_dojima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5390/8117/files/inspector_report_of_loading_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/latest_american_war_film_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/bra_size_fitting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/90180553499.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_off0000556f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 5376 bytes
SHA-256: 4c0df90f10286f1e2dc7a75f4b7eb6076285a66adfe272e2343a0fde91ce6217
font_01_sfnt_off000067bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 10256 bytes
SHA-256: fe4d5e83f54816f2c093cf05a120a52c3c41873735d2c77136225c528e0e2b3e

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