Malicious PDF — malware analysis report

Static analysis result for SHA-256 290ed2bfcdc7ec61…

MALICIOUS

PDF

39.0 KB Created: 2020-09-11 04:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 040552bea928a7df50c66363cd4f3a47 SHA-1: f1d0cc4e9ddabb59daf2859c5f7df130333f14b7 SHA-256: 290ed2bfcdc7ec61fad2c11f8b41730200b962316b60755df8a419ea6f1889d6
194 Risk Score

Malware Insights

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

The PDF contains a lure for an "angry birds epic hack tool" and exhibits characteristics of SEO poisoning or a link farm, with numerous embedded links to external PDF files. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the primary lure URL.

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=angry+birds+epic+hack+tool In PDF document text
    • http://files.mutualaiddisinfection.org/uploads/1/3/2/6/132683330/5b45da22f72ad70.pdfIn PDF document text
    • http://lezizo.maranathabiblens.com/uploads/1/3/0/7/130776132/4893919.pdfIn PDF document text
    • http://nopotik.mountainclay.com/uploads/1/3/0/7/130775034/9595267.pdfIn PDF document text
    • http://files.caid.org/uploads/1/3/1/4/131437636/sefusobeduweg.pdfIn PDF document text
    • http://files.learninginafterschool.org/uploads/1/3/1/6/131606487/5709862.pdfIn PDF document text
    • http://xakide.simpsonchorus.com/uploads/1/3/2/6/132696067/2978f697de79.pdfIn PDF document text
    • http://megex.galtandmaree.com/uploads/1/3/0/7/130776644/wininadexujutuwobar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/963627_f8097842567845f594e771da3eb633b8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2274a7_9ec5533060884a3595a7257db221ce88.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/baa514_c69d0bcf8bd140f8853fae4d8377adfa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc14e4_772ff7e4a316450e82a682d4d7e4bdd5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/palodofuwitigakamadefinof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9436/0469/files/asphalt_6_demo_for_nokia_206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/44635238052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/power_amplifier_notes.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_off000057a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A0 5632 bytes
SHA-256: 6bc554b92bbec48b7c0a08f5540ac8cb611684ecfc5ebe92e62223eee3f18a2e
font_01_sfnt_off00006ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 10700 bytes
SHA-256: fe71072da5cb807d46811ad3deb37739f70cd6573467d65a5756a663b16aae12

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