Malicious PDF — malware analysis report

Static analysis result for SHA-256 2143561fa3f8ed22…

MALICIOUS

PDF

67.8 KB Created: 2020-08-12 00:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c35012356d4aff7c447179d60f3bb832 SHA-1: 9b392c7c31821d5d3d777a4e93baf7d9fe77f3cb SHA-256: 2143561fa3f8ed2293a8c969c02db5ba0016990aa4c3b02a233ad376703f4c0e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=permenkes+akreditasi+rumah+sakit+2020+pdf'. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=permenkes+akreditasi+rumah+sakit+2020+pdf In PDF document text
    • http://files.initiatjve.com/uploads/1/3/1/8/131857115/zelugasetux_digikol_fafemomewekifa_nusukeginov.pdfIn PDF document text
    • http://files.justaskmigration.com/uploads/1/3/1/6/131606125/lakejejenevexe.pdfIn PDF document text
    • http://files.tiffanyfewel.com/uploads/1/3/2/6/132682820/gixewasamumorex.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/1/0429/4760/8730/files/kedirofig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/9932051038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1929/5131/files/interview_questions_and_answers_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/70070974259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/kisufok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/favasap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/fobia_social_tratamiento_cognitivo_conductual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/posuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9169/3463/files/dubai_expo_2020_master_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5589/3928/files/26958283957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/baguio_map_with_tourist_spots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/the_incredible_hulk_putlocker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/nazisolupoxujotidomugosop.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 4

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_off0000cc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9E 5588 bytes
SHA-256: 1b053ce8bf82a6da33316cc3b37d7c67a571732493da99188dbebbd44dc56390
font_01_sfnt_off0000df6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6B 10104 bytes
SHA-256: 9c2d8b5450fa140a14bf373968d5f4937cb0056fed97e389fb2586feb7423b6e

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