Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c447dbdad447d7…

MALICIOUS

PDF

41.5 KB Created: 2020-08-04 23:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c45e4ab53783baf3d7e63af6f838d1d8 SHA-1: 1153721105e02213b7a7309bfb632790305e0dc0 SHA-256: a3c447dbdad447d7aa6a9d720cfc923e792fd102b405c50f5557eb0791ab57ac
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as an exam date announcement. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document body, though heavily obfuscated, contains text related to 'exam date 2020 pdf download' and the malicious URL, reinforcing the lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic.

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.com/pify?keyword=bu+jhansi+exam+date+2020+pdf+download In PDF document text
    • http://files.bamboo.gs/uploads/1/3/1/6/131606128/pewub_vegatiwevip_rulumag_besokade.pdfIn PDF document text
    • http://files.bridgetobridge.org/uploads/1/3/1/3/131398338/9039819.pdfIn PDF document text
    • http://files.chiodobrokerage.com/uploads/1/3/1/3/131383255/0976b67.pdfIn PDF document text
    • http://jotevud.rainkraft.in/uploads/1/3/1/4/131438137/750744.pdfIn PDF document text
    • http://files.farmboss-utv.com/uploads/1/3/1/6/131607467/madakulamasap_timas_xogaliwu_sekelonana.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/1/0428/5012/3943/files/vemezizugojux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/rapibeliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/xugudemotonesaneri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/86919236631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/bible_kjv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8476/3556/files/parliamentary_and_presidential_form_of_government.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/lelalub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/69231373696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/xoxikanijepiludiliravudum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/10874667808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/35661718533.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 3

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_off000063c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 5744 bytes
SHA-256: 5367d10809702836b71da2e0dc3b25f4a09a204010e52ec6b892dba222e01a99
font_01_sfnt_off00007754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7754 9756 bytes
SHA-256: 29c9ee336f8a4b5c720786389d047bfa439da360710ff0132ea5171361059d3a

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