Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7ed9393e53e4de…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 22:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9cb1422634fbac90a17a7f843d605eb5 SHA-1: 798e0cdf637a40576a23597a8cad49e72e23cfeb SHA-256: cb7ed9393e53e4ded1e6431250377ffde7f62384bf5d22304332206a10372558
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a movie video song, intended to lure users to a potentially harmful website. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=naqaab+bengali+movie+video+song In PDF document text
    • http://files.drkirstensingler.com/uploads/1/3/1/8/131856352/db6b1c4cabeb66e.pdfIn PDF document text
    • http://dikunut.cdl4dvd.com/uploads/1/3/0/7/130740221/varokilimizuwosus.pdfIn PDF document text
    • http://files.katascuba.com/uploads/1/3/1/4/131483253/5349126.pdfIn PDF document text
    • http://jedibemam.lachaptercebs.org/uploads/1/3/0/7/130739693/fc30c88e28929aa.pdfIn PDF document text
    • http://jatusesis.familyaffaircateringandevents.com/uploads/1/3/2/6/132681556/5445615.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/1/0432/5212/1762/files/o_reilly_think_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/john_deere_lx178_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58585016777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/47294835975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8029/4306/files/25193848605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4201/7173/files/forex_trading_fundamental_and_technical_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8127/files/rovexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/56838002376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/wosimejamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/herbal_plants_with_pictures_and_names_and_uses.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 5344 bytes
SHA-256: 5c7b97e5d633e6c71d16c2a0ea993bdd8c2ce56c5a7bfeb1db104b3e98392814
font_01_sfnt_off0000810d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 9252 bytes
SHA-256: 9cbdf1079331cb0e5e5423d64270ce88cd475e0f9bee28afce56c6549d86fbca
font_02_sfnt_off00009ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF2 10256 bytes
SHA-256: d21c22952658ab75bb975f5cbb37ddfd476003b87f9f1a87f8a514dba9d334cc