Malicious PDF — malware analysis report

Static analysis result for SHA-256 23aa0881bb0a8441…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 19:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c056057e81b6afba2278bc64f829fce0 SHA-1: b4811e8cf7632ffee4739329cded511c33976ad6 SHA-256: 23aa0881bb0a8441e73b5e3bb6d61f827e8e67597418e5ed64b9c475911c2eb9
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'casino games offline apk' and includes the malicious redirector URL. This suggests a lure to download potentially malicious content, masquerading as a game. The PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics confirm the presence of link farming and redirection to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=casino+games+offline+apk In PDF document text
    • http://luxifu.anotherretrothing.com/uploads/1/3/2/7/132741194/welelazadome.pdfIn PDF document text
    • http://gavaliki.wsfishfarm.com/uploads/1/3/1/4/131454012/4289767.pdfIn PDF document text
    • http://files.knoxsundridge.ca/uploads/1/3/1/6/131636941/dukuzidezuzupa.pdfIn PDF document text
    • http://daladu.lifeisbeautifulandhealthy.com/uploads/1/3/2/3/132303195/8790470.pdfIn PDF document text
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.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/1/0433/6756/3429/files/alif_novel_episode_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/ashab_e_kahf_book_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/doctor_faustus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/kekametulaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/55638086367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/nipijukavofilujegagulejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/6012371751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/gugite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1453/6598/files/body_scanner_app_real.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/37576940012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/25911802201.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_off00006ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 5092 bytes
SHA-256: 34c3670ae8abdaaa565efd2b9a9a094507e7f7bc966480b98d41c270ab8b050b
font_01_sfnt_off00007c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2B 10120 bytes
SHA-256: 6eab7a2f536e5e9691e76a69caba999c87884cd99980d4fa9bbb3aeba107b201

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