Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fba8a227c27430d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 17:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0844b6b3911ad73ccf03c4a1da6c0b88 SHA-1: caf2a9bca88fc2e3a54a5b2a7213412e8f4b92df SHA-256: 1fba8a227c27430dd4c420cb67f506ff75bad9c8cc783bf4ebea3c005250a2ef
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'phone list template' and includes the malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a lure to a redirector that likely serves further malicious content.

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=phone+list+template+microsoft+word In PDF document text
    • http://xakageruk.annapolisrotaract.org/uploads/1/3/1/1/131164250/buragapudopaduxo.pdfIn PDF document text
    • http://files.bysamanthajo.net/uploads/1/3/2/6/132682899/begupolusise.pdfIn PDF document text
    • http://files.oldtel.com/uploads/1/3/1/4/131453316/3239411.pdfIn PDF document text
    • http://kikun.tools4changeseminar.com/uploads/1/3/1/6/131606617/julamidigupuw-zabexupasirixo-sapidasofewa.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/1/0433/1307/0238/files/tubag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1918/7862/files/international_paper_company_annual_report_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/sejitezinevelasazuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/aldous_huxley_as_portas_da_percepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/fewofezevatad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/48716071831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5204/7272/files/lokesowibososuxogekoxoneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/kaperuzutov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/babolevapuruwevik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/referencias_bibliograficas_apa_sexta_edicion.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_off00006f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 5488 bytes
SHA-256: 7ea4f6a0efcb2da7e07b1736f43e7573532e5d4f2adb02cf3673dda19179c552
font_01_sfnt_off000081be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BE 10440 bytes
SHA-256: 3b7235a87db9fc6cd32690109d6d8a7570c14300b98eaee0d2edc4141a2cf074

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